Finding the Fourth Proportional to 9,316, 12,856.12 and 5,124.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,316 : 12,856.12 = 5,124.16 : x
2. Step 2: Convert to fraction form
   9,316/12,856.12 = 5,124.16/x
3. Step 3: Cross multiply
   9,316x = 12,856.12 × 5,124.16
4. Step 4: Simplify right side
   9,316x = 65,876,815.86
5. Step 5: Solve for x
   x = 65,876,815.86/9,316
6. Step 6: Final answer
   x = 7,071.36