Finding the Fourth Proportional to 155,128.88, 214,016.29 and 89,705.62

Step by Step Solution

1. Step 1: Write the proportion equation
   155,128.88 : 214,016.29 = 89,705.62 : x
2. Step 2: Convert to fraction form
   155,128.88/214,016.29 = 89,705.62/x
3. Step 3: Cross multiply
   155,128.88x = 214,016.29 × 89,705.62
4. Step 4: Simplify right side
   155,128.88x = 19,198,463,127.17
5. Step 5: Solve for x
   x = 19,198,463,127.17/155,128.88
6. Step 6: Final answer
   x = 123,758.15