Finding the Fourth Proportional to 1,151,340.72, 1,725,965.64 and 402,978.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151,340.72 : 1,725,965.64 = 402,978.48 : x
2. Step 2: Convert to fraction form
   1,151,340.72/1,725,965.64 = 402,978.48/x
3. Step 3: Cross multiply
   1,151,340.72x = 1,725,965.64 × 402,978.48
4. Step 4: Simplify right side
   1,151,340.72x = 695,527,010,139.43
5. Step 5: Solve for x
   x = 695,527,010,139.43/1,151,340.72
6. Step 6: Final answer
   x = 604,101.81