Finding the Fourth Proportional to 724,528.71, 1,086,443.50 and 303,691.59

Step by Step Solution

1. Step 1: Write the proportion equation
   724,528.71 : 1,086,443.50 = 303,691.59 : x
2. Step 2: Convert to fraction form
   724,528.71/1,086,443.50 = 303,691.59/x
3. Step 3: Cross multiply
   724,528.71x = 1,086,443.50 × 303,691.59
4. Step 4: Simplify right side
   724,528.71x = 329,943,747,009.49
5. Step 5: Solve for x
   x = 329,943,747,009.49/724,528.71
6. Step 6: Final answer
   x = 455,390.86