Finding the Fourth Proportional to 81,878.42, 113,005.86 and 47,418.19

Step by Step Solution

1. Step 1: Write the proportion equation
   81,878.42 : 113,005.86 = 47,418.19 : x
2. Step 2: Convert to fraction form
   81,878.42/113,005.86 = 47,418.19/x
3. Step 3: Cross multiply
   81,878.42x = 113,005.86 × 47,418.19
4. Step 4: Simplify right side
   81,878.42x = 5,358,533,340.59
5. Step 5: Solve for x
   x = 5,358,533,340.59/81,878.42
6. Step 6: Final answer
   x = 65,445.00