Finding the Fourth Proportional to 123,948.10, 170,985.42 and 80,952.78

Step by Step Solution

1. Step 1: Write the proportion equation
   123,948.10 : 170,985.42 = 80,952.78 : x
2. Step 2: Convert to fraction form
   123,948.10/170,985.42 = 80,952.78/x
3. Step 3: Cross multiply
   123,948.10x = 170,985.42 × 80,952.78
4. Step 4: Simplify right side
   123,948.10x = 13,841,745,088.47
5. Step 5: Solve for x
   x = 13,841,745,088.47/123,948.10
6. Step 6: Final answer
   x = 111,673.72