Finding the Fourth Proportional to 123,847.72, 170,915.88 and 70,135

Step by Step Solution

1. Step 1: Write the proportion equation
   123,847.72 : 170,915.88 = 70,135 : x
2. Step 2: Convert to fraction form
   123,847.72/170,915.88 = 70,135/x
3. Step 3: Cross multiply
   123,847.72x = 170,915.88 × 70,135
4. Step 4: Simplify right side
   123,847.72x = 11,987,185,243.80
5. Step 5: Solve for x
   x = 11,987,185,243.80/123,847.72
6. Step 6: Final answer
   x = 96,789.71