Finding the Fourth Proportional to 81,285.10, 121,879.05 and 41,919.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,285.10 : 121,879.05 = 41,919.10 : x
2. Step 2: Convert to fraction form
   81,285.10/121,879.05 = 41,919.10/x
3. Step 3: Cross multiply
   81,285.10x = 121,879.05 × 41,919.10
4. Step 4: Simplify right side
   81,285.10x = 5,109,060,084.86
5. Step 5: Solve for x
   x = 5,109,060,084.86/81,285.10
6. Step 6: Final answer
   x = 62,853.59