Finding the Fourth Proportional to 1,098,778.24, 1,516,334 and 663,196.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098,778.24 : 1,516,334 = 663,196.18 : x
2. Step 2: Convert to fraction form
   1,098,778.24/1,516,334 = 663,196.18/x
3. Step 3: Cross multiply
   1,098,778.24x = 1,516,334 × 663,196.18
4. Step 4: Simplify right side
   1,098,778.24x = 1,005,626,916,404.12
5. Step 5: Solve for x
   x = 1,005,626,916,404.12/1,098,778.24
6. Step 6: Final answer
   x = 915,222.82