Finding the Fourth Proportional to 91,339.80, 137,028.87 and 38,748.12

Step by Step Solution

1. Step 1: Write the proportion equation
   91,339.80 : 137,028.87 = 38,748.12 : x
2. Step 2: Convert to fraction form
   91,339.80/137,028.87 = 38,748.12/x
3. Step 3: Cross multiply
   91,339.80x = 137,028.87 × 38,748.12
4. Step 4: Simplify right side
   91,339.80x = 5,309,611,098.22
5. Step 5: Solve for x
   x = 5,309,611,098.22/91,339.80
6. Step 6: Final answer
   x = 58,130.31