Finding the Fourth Proportional to 166,213, 229,375.16 and 90,761.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,213 : 229,375.16 = 90,761.50 : x
2. Step 2: Convert to fraction form
   166,213/229,375.16 = 90,761.50/x
3. Step 3: Cross multiply
   166,213x = 229,375.16 × 90,761.50
4. Step 4: Simplify right side
   166,213x = 20,818,433,584.34
5. Step 5: Solve for x
   x = 20,818,433,584.34/166,213
6. Step 6: Final answer
   x = 125,251.54