Finding the Fourth Proportional to 123,731.72, 170,889 and 83,611.16

Step by Step Solution

1. Step 1: Write the proportion equation
   123,731.72 : 170,889 = 83,611.16 : x
2. Step 2: Convert to fraction form
   123,731.72/170,889 = 83,611.16/x
3. Step 3: Cross multiply
   123,731.72x = 170,889 × 83,611.16
4. Step 4: Simplify right side
   123,731.72x = 14,288,227,521.24
5. Step 5: Solve for x
   x = 14,288,227,521.24/123,731.72
6. Step 6: Final answer
   x = 115,477.48