Finding the Fourth Proportional to 81,578.10, 112,539.57 and 52,906.83

Step by Step Solution

1. Step 1: Write the proportion equation
   81,578.10 : 112,539.57 = 52,906.83 : x
2. Step 2: Convert to fraction form
   81,578.10/112,539.57 = 52,906.83/x
3. Step 3: Cross multiply
   81,578.10x = 112,539.57 × 52,906.83
4. Step 4: Simplify right side
   81,578.10x = 5,954,111,898.26
5. Step 5: Solve for x
   x = 5,954,111,898.26/81,578.10
6. Step 6: Final answer
   x = 72,986.65