Finding the Fourth Proportional to 51,066.72, 70,472.70 and 28,710.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,066.72 : 70,472.70 = 28,710.72 : x
2. Step 2: Convert to fraction form
   51,066.72/70,472.70 = 28,710.72/x
3. Step 3: Cross multiply
   51,066.72x = 70,472.70 × 28,710.72
4. Step 4: Simplify right side
   51,066.72x = 2,023,321,957.34
5. Step 5: Solve for x
   x = 2,023,321,957.34/51,066.72
6. Step 6: Final answer
   x = 39,621.15