Finding the Fourth Proportional to 123,104.42, 169,897.15 and 72,159.95

Step by Step Solution

1. Step 1: Write the proportion equation
   123,104.42 : 169,897.15 = 72,159.95 : x
2. Step 2: Convert to fraction form
   123,104.42/169,897.15 = 72,159.95/x
3. Step 3: Cross multiply
   123,104.42x = 169,897.15 × 72,159.95
4. Step 4: Simplify right side
   123,104.42x = 12,259,768,999.66
5. Step 5: Solve for x
   x = 12,259,768,999.66/123,104.42
6. Step 6: Final answer
   x = 99,588.38