Finding the Fourth Proportional to 9,316.26, 12,861.91 and 5,781.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,316.26 : 12,861.91 = 5,781.42 : x
2. Step 2: Convert to fraction form
   9,316.26/12,861.91 = 5,781.42/x
3. Step 3: Cross multiply
   9,316.26x = 12,861.91 × 5,781.42
4. Step 4: Simplify right side
   9,316.26x = 74,360,039.40
5. Step 5: Solve for x
   x = 74,360,039.40/9,316.26
6. Step 6: Final answer
   x = 7,981.75