Finding the Fourth Proportional to 81,282.83, 121,858.63 and 74,721.83

Step by Step Solution

1. Step 1: Write the proportion equation
   81,282.83 : 121,858.63 = 74,721.83 : x
2. Step 2: Convert to fraction form
   81,282.83/121,858.63 = 74,721.83/x
3. Step 3: Cross multiply
   81,282.83x = 121,858.63 × 74,721.83
4. Step 4: Simplify right side
   81,282.83x = 9,105,499,038.80
5. Step 5: Solve for x
   x = 9,105,499,038.80/81,282.83
6. Step 6: Final answer
   x = 112,022.42