Finding the Fourth Proportional to 156,336.50, 215,744.37 and 89,268.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,336.50 : 215,744.37 = 89,268.50 : x
2. Step 2: Convert to fraction form
   156,336.50/215,744.37 = 89,268.50/x
3. Step 3: Cross multiply
   156,336.50x = 215,744.37 × 89,268.50
4. Step 4: Simplify right side
   156,336.50x = 19,259,176,293.35
5. Step 5: Solve for x
   x = 19,259,176,293.35/156,336.50
6. Step 6: Final answer
   x = 123,190.53