Finding the Fourth Proportional to 1,012,340.88, 1,396,982.16 and 553,479.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012,340.88 : 1,396,982.16 = 553,479.12 : x
2. Step 2: Convert to fraction form
   1,012,340.88/1,396,982.16 = 553,479.12/x
3. Step 3: Cross multiply
   1,012,340.88x = 1,396,982.16 × 553,479.12
4. Step 4: Simplify right side
   1,012,340.88x = 773,200,456,572.50
5. Step 5: Solve for x
   x = 773,200,456,572.50/1,012,340.88
6. Step 6: Final answer
   x = 763,774.80