Finding the Fourth Proportional to 81,456.10, 112,502.73 and 64,893.22

Step by Step Solution

1. Step 1: Write the proportion equation
   81,456.10 : 112,502.73 = 64,893.22 : x
2. Step 2: Convert to fraction form
   81,456.10/112,502.73 = 64,893.22/x
3. Step 3: Cross multiply
   81,456.10x = 112,502.73 × 64,893.22
4. Step 4: Simplify right side
   81,456.10x = 7,300,664,408.49
5. Step 5: Solve for x
   x = 7,300,664,408.49/81,456.10
6. Step 6: Final answer
   x = 89,626.98