Finding the Fourth Proportional to 123,685.13, 170,685.53 and 69,969

Step by Step Solution

1. Step 1: Write the proportion equation
   123,685.13 : 170,685.53 = 69,969 : x
2. Step 2: Convert to fraction form
   123,685.13/170,685.53 = 69,969/x
3. Step 3: Cross multiply
   123,685.13x = 170,685.53 × 69,969
4. Step 4: Simplify right side
   123,685.13x = 11,942,695,498.73
5. Step 5: Solve for x
   x = 11,942,695,498.73/123,685.13
6. Step 6: Final answer
   x = 96,557.25