Finding the Fourth Proportional to 9,116.78, 12,581.19 and 5,342.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,116.78 : 12,581.19 = 5,342.18 : x
2. Step 2: Convert to fraction form
   9,116.78/12,581.19 = 5,342.18/x
3. Step 3: Cross multiply
   9,116.78x = 12,581.19 × 5,342.18
4. Step 4: Simplify right side
   9,116.78x = 67,210,918.69
5. Step 5: Solve for x
   x = 67,210,918.69/9,116.78
6. Step 6: Final answer
   x = 7,372.23