Finding the Fourth Proportional to 123,132.96, 169,900.74 and 72,143.06

Step by Step Solution

1. Step 1: Write the proportion equation
   123,132.96 : 169,900.74 = 72,143.06 : x
2. Step 2: Convert to fraction form
   123,132.96/169,900.74 = 72,143.06/x
3. Step 3: Cross multiply
   123,132.96x = 169,900.74 × 72,143.06
4. Step 4: Simplify right side
   123,132.96x = 12,257,158,430.36
5. Step 5: Solve for x
   x = 12,257,158,430.36/123,132.96
6. Step 6: Final answer
   x = 99,544.09