Finding the Fourth Proportional to 156,983.50, 216,656.86 and 89,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,983.50 : 216,656.86 = 89,915.50 : x
2. Step 2: Convert to fraction form
   156,983.50/216,656.86 = 89,915.50/x
3. Step 3: Cross multiply
   156,983.50x = 216,656.86 × 89,915.50
4. Step 4: Simplify right side
   156,983.50x = 19,480,809,895.33
5. Step 5: Solve for x
   x = 19,480,809,895.33/156,983.50
6. Step 6: Final answer
   x = 124,094.63