Finding the Fourth Proportional to 81,105.29, 111,917.60 and 47,112.84

Step by Step Solution

1. Step 1: Write the proportion equation
   81,105.29 : 111,917.60 = 47,112.84 : x
2. Step 2: Convert to fraction form
   81,105.29/111,917.60 = 47,112.84/x
3. Step 3: Cross multiply
   81,105.29x = 111,917.60 × 47,112.84
4. Step 4: Simplify right side
   81,105.29x = 5,272,755,746.42
5. Step 5: Solve for x
   x = 5,272,755,746.42/81,105.29
6. Step 6: Final answer
   x = 65,011.25