Finding the Fourth Proportional to 81,499.77, 112,419.09 and 53,204.85

Step by Step Solution

1. Step 1: Write the proportion equation
   81,499.77 : 112,419.09 = 53,204.85 : x
2. Step 2: Convert to fraction form
   81,499.77/112,419.09 = 53,204.85/x
3. Step 3: Cross multiply
   81,499.77x = 112,419.09 × 53,204.85
4. Step 4: Simplify right side
   81,499.77x = 5,981,240,820.59
5. Step 5: Solve for x
   x = 5,981,240,820.59/81,499.77
6. Step 6: Final answer
   x = 73,389.67