Finding the Fourth Proportional to 123,010.88, 169,742.25 and 72,020.97

Step by Step Solution

1. Step 1: Write the proportion equation
   123,010.88 : 169,742.25 = 72,020.97 : x
2. Step 2: Convert to fraction form
   123,010.88/169,742.25 = 72,020.97/x
3. Step 3: Cross multiply
   123,010.88x = 169,742.25 × 72,020.97
4. Step 4: Simplify right side
   123,010.88x = 12,225,001,494.98
5. Step 5: Solve for x
   x = 12,225,001,494.98/123,010.88
6. Step 6: Final answer
   x = 99,381.47