Finding the Fourth Proportional to 897,411.87, 1,238,429.52 and 515,512.53

Step by Step Solution

1. Step 1: Write the proportion equation
   897,411.87 : 1,238,429.52 = 515,512.53 : x
2. Step 2: Convert to fraction form
   897,411.87/1,238,429.52 = 515,512.53/x
3. Step 3: Cross multiply
   897,411.87x = 1,238,429.52 × 515,512.53
4. Step 4: Simplify right side
   897,411.87x = 638,425,935,081.89
5. Step 5: Solve for x
   x = 638,425,935,081.89/897,411.87
6. Step 6: Final answer
   x = 711,407.95