Finding the Fourth Proportional to 160,139.57, 220,983 and 88,515.32

Step by Step Solution

1. Step 1: Write the proportion equation
   160,139.57 : 220,983 = 88,515.32 : x
2. Step 2: Convert to fraction form
   160,139.57/220,983 = 88,515.32/x
3. Step 3: Cross multiply
   160,139.57x = 220,983 × 88,515.32
4. Step 4: Simplify right side
   160,139.57x = 19,560,380,959.56
5. Step 5: Solve for x
   x = 19,560,380,959.56/160,139.57
6. Step 6: Final answer
   x = 122,145.83