Finding the Fourth Proportional to 1,070,640.72, 1,605,452.52 and 621,499.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070,640.72 : 1,605,452.52 = 621,499.32 : x
2. Step 2: Convert to fraction form
   1,070,640.72/1,605,452.52 = 621,499.32/x
3. Step 3: Cross multiply
   1,070,640.72x = 1,605,452.52 × 621,499.32
4. Step 4: Simplify right side
   1,070,640.72x = 997,787,649,472.29
5. Step 5: Solve for x
   x = 997,787,649,472.29/1,070,640.72
6. Step 6: Final answer
   x = 931,953.76