Finding the Fourth Proportional to 123,615.61, 170,592.89 and 69,908.63

Step by Step Solution

1. Step 1: Write the proportion equation
   123,615.61 : 170,592.89 = 69,908.63 : x
2. Step 2: Convert to fraction form
   123,615.61/170,592.89 = 69,908.63/x
3. Step 3: Cross multiply
   123,615.61x = 170,592.89 × 69,908.63
4. Step 4: Simplify right side
   123,615.61x = 11,925,914,025.13
5. Step 5: Solve for x
   x = 11,925,914,025.13/123,615.61
6. Step 6: Final answer
   x = 96,475.80