Finding the Fourth Proportional to 1,439,601,480.78, 1,986,649,559.34 and 779,551,758.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439,601,480.78 : 1,986,649,559.34 = 779,551,758.78 : x
2. Step 2: Convert to fraction form
   1,439,601,480.78/1,986,649,559.34 = 779,551,758.78/x
3. Step 3: Cross multiply
   1,439,601,480.78x = 1,986,649,559.34 × 779,551,758.78
4. Step 4: Simplify right side
   1,439,601,480.78x = 1,548,696,158,063,008,768
5. Step 5: Solve for x
   x = 1,548,696,158,063,008,768/1,439,601,480.78
6. Step 6: Final answer
   x = 1,075,781,164.95