Finding the Fourth Proportional to 121,166.50, 181,766.31 and 42,268.90

Step by Step Solution

1. Step 1: Write the proportion equation
   121,166.50 : 181,766.31 = 42,268.90 : x
2. Step 2: Convert to fraction form
   121,166.50/181,766.31 = 42,268.90/x
3. Step 3: Cross multiply
   121,166.50x = 181,766.31 × 42,268.90
4. Step 4: Simplify right side
   121,166.50x = 7,683,061,980.76
5. Step 5: Solve for x
   x = 7,683,061,980.76/121,166.50
6. Step 6: Final answer
   x = 63,409.13