Finding the Fourth Proportional to 156,136.50, 215,497.56 and 89,068.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,136.50 : 215,497.56 = 89,068.50 : x
2. Step 2: Convert to fraction form
   156,136.50/215,497.56 = 89,068.50/x
3. Step 3: Cross multiply
   156,136.50x = 215,497.56 × 89,068.50
4. Step 4: Simplify right side
   156,136.50x = 19,194,044,422.86
5. Step 5: Solve for x
   x = 19,194,044,422.86/156,136.50
6. Step 6: Final answer
   x = 122,931.18