Finding the Fourth Proportional to 81,818.82, 112,911.50 and 47,830.21

Step by Step Solution

1. Step 1: Write the proportion equation
   81,818.82 : 112,911.50 = 47,830.21 : x
2. Step 2: Convert to fraction form
   81,818.82/112,911.50 = 47,830.21/x
3. Step 3: Cross multiply
   81,818.82x = 112,911.50 × 47,830.21
4. Step 4: Simplify right side
   81,818.82x = 5,400,580,593.71
5. Step 5: Solve for x
   x = 5,400,580,593.71/81,818.82
6. Step 6: Final answer
   x = 66,006.58