Finding the Fourth Proportional to 1,435,008,612.48, 1,980,311,868.78 and 774,958,890.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435,008,612.48 : 1,980,311,868.78 = 774,958,890.48 : x
2. Step 2: Convert to fraction form
   1,435,008,612.48/1,980,311,868.78 = 774,958,890.48/x
3. Step 3: Cross multiply
   1,435,008,612.48x = 1,980,311,868.78 × 774,958,890.48
4. Step 4: Simplify right side
   1,435,008,612.48x = 1,534,660,288,640,526,336
5. Step 5: Solve for x
   x = 1,534,660,288,640,526,336/1,435,008,612.48
6. Step 6: Final answer
   x = 1,069,443,259.98