Finding the Fourth Proportional to 9,316.56, 12,856.68 and 5,124.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,316.56 : 12,856.68 = 5,124.72 : x
2. Step 2: Convert to fraction form
   9,316.56/12,856.68 = 5,124.72/x
3. Step 3: Cross multiply
   9,316.56x = 12,856.68 × 5,124.72
4. Step 4: Simplify right side
   9,316.56x = 65,886,885.13
5. Step 5: Solve for x
   x = 65,886,885.13/9,316.56
6. Step 6: Final answer
   x = 7,072.02