Finding the Fourth Proportional to 91,633.48, 138,074.51 and 75,358.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,633.48 : 138,074.51 = 75,358.10 : x
2. Step 2: Convert to fraction form
   91,633.48/138,074.51 = 75,358.10/x
3. Step 3: Cross multiply
   91,633.48x = 138,074.51 × 75,358.10
4. Step 4: Simplify right side
   91,633.48x = 10,405,032,382.97
5. Step 5: Solve for x
   x = 10,405,032,382.97/91,633.48
6. Step 6: Final answer
   x = 113,550.56