Finding the Fourth Proportional to 38,152.72, 52,651.56 and 21,391.12

Step by Step Solution

1. Step 1: Write the proportion equation
   38,152.72 : 52,651.56 = 21,391.12 : x
2. Step 2: Convert to fraction form
   38,152.72/52,651.56 = 21,391.12/x
3. Step 3: Cross multiply
   38,152.72x = 52,651.56 × 21,391.12
4. Step 4: Simplify right side
   38,152.72x = 1,126,275,838.15
5. Step 5: Solve for x
   x = 1,126,275,838.15/38,152.72
6. Step 6: Final answer
   x = 29,520.20