Finding the Fourth Proportional to 123,993.51, 171,129.72 and 75,623.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,993.51 : 171,129.72 = 75,623.50 : x
2. Step 2: Convert to fraction form
   123,993.51/171,129.72 = 75,623.50/x
3. Step 3: Cross multiply
   123,993.51x = 171,129.72 × 75,623.50
4. Step 4: Simplify right side
   123,993.51x = 12,941,428,380.42
5. Step 5: Solve for x
   x = 12,941,428,380.42/123,993.51
6. Step 6: Final answer
   x = 104,371.82