Finding the Fourth Proportional to 91,630.82, 137,273.79 and 71,849.30

Step by Step Solution

1. Step 1: Write the proportion equation
   91,630.82 : 137,273.79 = 71,849.30 : x
2. Step 2: Convert to fraction form
   91,630.82/137,273.79 = 71,849.30/x
3. Step 3: Cross multiply
   91,630.82x = 137,273.79 × 71,849.30
4. Step 4: Simplify right side
   91,630.82x = 9,863,025,719.85
5. Step 5: Solve for x
   x = 9,863,025,719.85/91,630.82
6. Step 6: Final answer
   x = 107,638.74