Finding the Fourth Proportional to 500,315.72, 750,245.76 and 215,871.53

Step by Step Solution

1. Step 1: Write the proportion equation
   500,315.72 : 750,245.76 = 215,871.53 : x
2. Step 2: Convert to fraction form
   500,315.72/750,245.76 = 215,871.53/x
3. Step 3: Cross multiply
   500,315.72x = 750,245.76 × 215,871.53
4. Step 4: Simplify right side
   500,315.72x = 161,956,696,335.98
5. Step 5: Solve for x
   x = 161,956,696,335.98/500,315.72
6. Step 6: Final answer
   x = 323,708.99