Finding the Fourth Proportional to 120,324.50, 166,049.78 and 65,875.76

Step by Step Solution

1. Step 1: Write the proportion equation
   120,324.50 : 166,049.78 = 65,875.76 : x
2. Step 2: Convert to fraction form
   120,324.50/166,049.78 = 65,875.76/x
3. Step 3: Cross multiply
   120,324.50x = 166,049.78 × 65,875.76
4. Step 4: Simplify right side
   120,324.50x = 10,938,654,295.71
5. Step 5: Solve for x
   x = 10,938,654,295.71/120,324.50
6. Step 6: Final answer
   x = 90,909.62