Finding the Fourth Proportional to 91,602.59, 138,027.89 and 75,327.21

Step by Step Solution

1. Step 1: Write the proportion equation
   91,602.59 : 138,027.89 = 75,327.21 : x
2. Step 2: Convert to fraction form
   91,602.59/138,027.89 = 75,327.21/x
3. Step 3: Cross multiply
   91,602.59x = 138,027.89 × 75,327.21
4. Step 4: Simplify right side
   91,602.59x = 10,397,256,044.20
5. Step 5: Solve for x
   x = 10,397,256,044.20/91,602.59
6. Step 6: Final answer
   x = 113,503.96