Finding the Fourth Proportional to 123,619.62, 170,572.84 and 69,172.89

Step by Step Solution

1. Step 1: Write the proportion equation
   123,619.62 : 170,572.84 = 69,172.89 : x
2. Step 2: Convert to fraction form
   123,619.62/170,572.84 = 69,172.89/x
3. Step 3: Cross multiply
   123,619.62x = 170,572.84 × 69,172.89
4. Step 4: Simplify right side
   123,619.62x = 11,799,016,298.31
5. Step 5: Solve for x
   x = 11,799,016,298.31/123,619.62
6. Step 6: Final answer
   x = 95,446.15