Finding the Fourth Proportional to 160,215.42, 221,088.42 and 88,590.72

Step by Step Solution

1. Step 1: Write the proportion equation
   160,215.42 : 221,088.42 = 88,590.72 : x
2. Step 2: Convert to fraction form
   160,215.42/221,088.42 = 88,590.72/x
3. Step 3: Cross multiply
   160,215.42x = 221,088.42 × 88,590.72
4. Step 4: Simplify right side
   160,215.42x = 19,586,382,311.46
5. Step 5: Solve for x
   x = 19,586,382,311.46/160,215.42
6. Step 6: Final answer
   x = 122,250.29