Finding the Fourth Proportional to 8,407.82, 12,592.29 and 8,116.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,407.82 : 12,592.29 = 8,116.22 : x
2. Step 2: Convert to fraction form
   8,407.82/12,592.29 = 8,116.22/x
3. Step 3: Cross multiply
   8,407.82x = 12,592.29 × 8,116.22
4. Step 4: Simplify right side
   8,407.82x = 102,201,795.94
5. Step 5: Solve for x
   x = 102,201,795.94/8,407.82
6. Step 6: Final answer
   x = 12,155.56