Finding the Fourth Proportional to 123,086.72, 169,859.76 and 66,498.08

Step by Step Solution

1. Step 1: Write the proportion equation
   123,086.72 : 169,859.76 = 66,498.08 : x
2. Step 2: Convert to fraction form
   123,086.72/169,859.76 = 66,498.08/x
3. Step 3: Cross multiply
   123,086.72x = 169,859.76 × 66,498.08
4. Step 4: Simplify right side
   123,086.72x = 11,295,347,909.26
5. Step 5: Solve for x
   x = 11,295,347,909.26/123,086.72
6. Step 6: Final answer
   x = 91,767.40