Finding the Fourth Proportional to 166,589, 229,898.22 and 91,137.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,589 : 229,898.22 = 91,137.50 : x
2. Step 2: Convert to fraction form
   166,589/229,898.22 = 91,137.50/x
3. Step 3: Cross multiply
   166,589x = 229,898.22 × 91,137.50
4. Step 4: Simplify right side
   166,589x = 20,952,349,025.25
5. Step 5: Solve for x
   x = 20,952,349,025.25/166,589
6. Step 6: Final answer
   x = 125,772.70