Finding the Fourth Proportional to 503,456.76, 754,859.72 and 215,456.43

Step by Step Solution

1. Step 1: Write the proportion equation
   503,456.76 : 754,859.72 = 215,456.43 : x
2. Step 2: Convert to fraction form
   503,456.76/754,859.72 = 215,456.43/x
3. Step 3: Cross multiply
   503,456.76x = 754,859.72 × 215,456.43
4. Step 4: Simplify right side
   503,456.76x = 162,639,379,344.72
5. Step 5: Solve for x
   x = 162,639,379,344.72/503,456.76
6. Step 6: Final answer
   x = 323,045.38