Finding the Fourth Proportional to 1,390,931.52, 1,919,532.72 and 779,110.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,931.52 : 1,919,532.72 = 779,110.56 : x
2. Step 2: Convert to fraction form
   1,390,931.52/1,919,532.72 = 779,110.56/x
3. Step 3: Cross multiply
   1,390,931.52x = 1,919,532.72 × 779,110.56
4. Step 4: Simplify right side
   1,390,931.52x = 1,495,528,212,417.52
5. Step 5: Solve for x
   x = 1,495,528,212,417.52/1,390,931.52
6. Step 6: Final answer
   x = 1,075,199.02