Finding the Fourth Proportional to 155,458.10, 214,532.16 and 88,390.10

Step by Step Solution

1. Step 1: Write the proportion equation
   155,458.10 : 214,532.16 = 88,390.10 : x
2. Step 2: Convert to fraction form
   155,458.10/214,532.16 = 88,390.10/x
3. Step 3: Cross multiply
   155,458.10x = 214,532.16 × 88,390.10
4. Step 4: Simplify right side
   155,458.10x = 18,962,518,002.96
5. Step 5: Solve for x
   x = 18,962,518,002.96/155,458.10
6. Step 6: Final answer
   x = 121,978.32