Finding the Fourth Proportional to 156,196.50, 215,590.05 and 89,167.38

Step by Step Solution

1. Step 1: Write the proportion equation
   156,196.50 : 215,590.05 = 89,167.38 : x
2. Step 2: Convert to fraction form
   156,196.50/215,590.05 = 89,167.38/x
3. Step 3: Cross multiply
   156,196.50x = 215,590.05 × 89,167.38
4. Step 4: Simplify right side
   156,196.50x = 19,223,599,912.57
5. Step 5: Solve for x
   x = 19,223,599,912.57/156,196.50
6. Step 6: Final answer
   x = 123,073.18