Finding the Fourth Proportional to 91,631.08, 137,440.06 and 28,449.48

Step by Step Solution

1. Step 1: Write the proportion equation
   91,631.08 : 137,440.06 = 28,449.48 : x
2. Step 2: Convert to fraction form
   91,631.08/137,440.06 = 28,449.48/x
3. Step 3: Cross multiply
   91,631.08x = 137,440.06 × 28,449.48
4. Step 4: Simplify right side
   91,631.08x = 3,910,098,238.17
5. Step 5: Solve for x
   x = 3,910,098,238.17/91,631.08
6. Step 6: Final answer
   x = 42,672.18