Finding the Fourth Proportional to 156,193.50, 215,585.91 and 89,164.38

Step by Step Solution

1. Step 1: Write the proportion equation
   156,193.50 : 215,585.91 = 89,164.38 : x
2. Step 2: Convert to fraction form
   156,193.50/215,585.91 = 89,164.38/x
3. Step 3: Cross multiply
   156,193.50x = 215,585.91 × 89,164.38
4. Step 4: Simplify right side
   156,193.50x = 19,222,584,001.89
5. Step 5: Solve for x
   x = 19,222,584,001.89/156,193.50
6. Step 6: Final answer
   x = 123,069.04