Finding the Fourth Proportional to 91,613.39, 138,044.21 and 75,338.03

Step by Step Solution

1. Step 1: Write the proportion equation
   91,613.39 : 138,044.21 = 75,338.03 : x
2. Step 2: Convert to fraction form
   91,613.39/138,044.21 = 75,338.03/x
3. Step 3: Cross multiply
   91,613.39x = 138,044.21 × 75,338.03
4. Step 4: Simplify right side
   91,613.39x = 10,399,978,834.31
5. Step 5: Solve for x
   x = 10,399,978,834.31/91,613.39
6. Step 6: Final answer
   x = 113,520.29