Finding the Fourth Proportional to 9,316.17, 12,855.78 and 5,124.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,316.17 : 12,855.78 = 5,124.42 : x
2. Step 2: Convert to fraction form
   9,316.17/12,855.78 = 5,124.42/x
3. Step 3: Cross multiply
   9,316.17x = 12,855.78 × 5,124.42
4. Step 4: Simplify right side
   9,316.17x = 65,878,416.15
5. Step 5: Solve for x
   x = 65,878,416.15/9,316.17
6. Step 6: Final answer
   x = 7,071.41