Finding the Fourth Proportional to 156,980.02, 216,627.69 and 89,003.20

Step by Step Solution

1. Step 1: Write the proportion equation
   156,980.02 : 216,627.69 = 89,003.20 : x
2. Step 2: Convert to fraction form
   156,980.02/216,627.69 = 89,003.20/x
3. Step 3: Cross multiply
   156,980.02x = 216,627.69 × 89,003.20
4. Step 4: Simplify right side
   156,980.02x = 19,280,557,618.61
5. Step 5: Solve for x
   x = 19,280,557,618.61/156,980.02
6. Step 6: Final answer
   x = 122,821.73