Finding the Fourth Proportional to 9,316.54, 12,856.50 and 5,124.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,316.54 : 12,856.50 = 5,124.76 : x
2. Step 2: Convert to fraction form
   9,316.54/12,856.50 = 5,124.76/x
3. Step 3: Cross multiply
   9,316.54x = 12,856.50 × 5,124.76
4. Step 4: Simplify right side
   9,316.54x = 65,886,476.94
5. Step 5: Solve for x
   x = 65,886,476.94/9,316.54
6. Step 6: Final answer
   x = 7,071.99