Finding the Fourth Proportional to 81,081, 121,590.52 and 38,949.05

Step by Step Solution

1. Step 1: Write the proportion equation
   81,081 : 121,590.52 = 38,949.05 : x
2. Step 2: Convert to fraction form
   81,081/121,590.52 = 38,949.05/x
3. Step 3: Cross multiply
   81,081x = 121,590.52 × 38,949.05
4. Step 4: Simplify right side
   81,081x = 4,735,835,449.61
5. Step 5: Solve for x
   x = 4,735,835,449.61/81,081
6. Step 6: Final answer
   x = 58,408.70