Finding the Fourth Proportional to 91,990.50, 138,029.31 and 38,694.15

Step by Step Solution

1. Step 1: Write the proportion equation
   91,990.50 : 138,029.31 = 38,694.15 : x
2. Step 2: Convert to fraction form
   91,990.50/138,029.31 = 38,694.15/x
3. Step 3: Cross multiply
   91,990.50x = 138,029.31 × 38,694.15
4. Step 4: Simplify right side
   91,990.50x = 5,340,926,825.54
5. Step 5: Solve for x
   x = 5,340,926,825.54/91,990.50
6. Step 6: Final answer
   x = 58,059.55