Finding the Fourth Proportional to 91,931.72, 126,766.50 and 83,883.56

Step by Step Solution

1. Step 1: Write the proportion equation
   91,931.72 : 126,766.50 = 83,883.56 : x
2. Step 2: Convert to fraction form
   91,931.72/126,766.50 = 83,883.56/x
3. Step 3: Cross multiply
   91,931.72x = 126,766.50 × 83,883.56
4. Step 4: Simplify right side
   91,931.72x = 10,633,625,308.74
5. Step 5: Solve for x
   x = 10,633,625,308.74/91,931.72
6. Step 6: Final answer
   x = 115,668.73