Finding the Fourth Proportional to 1,128,589.25, 1,692,096.53 and 418,426.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,589.25 : 1,692,096.53 = 418,426.61 : x
2. Step 2: Convert to fraction form
   1,128,589.25/1,692,096.53 = 418,426.61/x
3. Step 3: Cross multiply
   1,128,589.25x = 1,692,096.53 × 418,426.61
4. Step 4: Simplify right side
   1,128,589.25x = 708,018,204,288.05
5. Step 5: Solve for x
   x = 708,018,204,288.05/1,128,589.25
6. Step 6: Final answer
   x = 627,348.00