Finding the Fourth Proportional to 81,826.22, 122,700.56 and 28,499.60

Step by Step Solution

1. Step 1: Write the proportion equation
   81,826.22 : 122,700.56 = 28,499.60 : x
2. Step 2: Convert to fraction form
   81,826.22/122,700.56 = 28,499.60/x
3. Step 3: Cross multiply
   81,826.22x = 122,700.56 × 28,499.60
4. Step 4: Simplify right side
   81,826.22x = 3,496,917,044.03
5. Step 5: Solve for x
   x = 3,496,917,044.03/81,826.22
6. Step 6: Final answer
   x = 42,735.90