Finding the Fourth Proportional to 91,682.72, 137,543.52 and 28,501.28

Step by Step Solution

1. Step 1: Write the proportion equation
   91,682.72 : 137,543.52 = 28,501.28 : x
2. Step 2: Convert to fraction form
   91,682.72/137,543.52 = 28,501.28/x
3. Step 3: Cross multiply
   91,682.72x = 137,543.52 × 28,501.28
4. Step 4: Simplify right side
   91,682.72x = 3,920,166,375.71
5. Step 5: Solve for x
   x = 3,920,166,375.71/91,682.72
6. Step 6: Final answer
   x = 42,757.96