Finding the Fourth Proportional to 123,685.88, 170,686.56 and 69,969.76

Step by Step Solution

1. Step 1: Write the proportion equation
   123,685.88 : 170,686.56 = 69,969.76 : x
2. Step 2: Convert to fraction form
   123,685.88/170,686.56 = 69,969.76/x
3. Step 3: Cross multiply
   123,685.88x = 170,686.56 × 69,969.76
4. Step 4: Simplify right side
   123,685.88x = 11,942,897,638.43
5. Step 5: Solve for x
   x = 11,942,897,638.43/123,685.88
6. Step 6: Final answer
   x = 96,558.29