Finding the Fourth Proportional to 120,841.50, 166,761.18 and 67,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,841.50 : 166,761.18 = 67,131.50 : x
2. Step 2: Convert to fraction form
   120,841.50/166,761.18 = 67,131.50/x
3. Step 3: Cross multiply
   120,841.50x = 166,761.18 × 67,131.50
4. Step 4: Simplify right side
   120,841.50x = 11,194,928,155.17
5. Step 5: Solve for x
   x = 11,194,928,155.17/120,841.50
6. Step 6: Final answer
   x = 92,641.42