Finding the Fourth Proportional to 123,104.38, 169,897.11 and 72,159.92

Step by Step Solution

1. Step 1: Write the proportion equation
   123,104.38 : 169,897.11 = 72,159.92 : x
2. Step 2: Convert to fraction form
   123,104.38/169,897.11 = 72,159.92/x
3. Step 3: Cross multiply
   123,104.38x = 169,897.11 × 72,159.92
4. Step 4: Simplify right side
   123,104.38x = 12,259,760,655.55
5. Step 5: Solve for x
   x = 12,259,760,655.55/123,104.38
6. Step 6: Final answer
   x = 99,588.34