Finding the Fourth Proportional to 9,316.72, 12,857.18 and 5,125

Step by Step Solution

1. Step 1: Write the proportion equation
   9,316.72 : 12,857.18 = 5,125 : x
2. Step 2: Convert to fraction form
   9,316.72/12,857.18 = 5,125/x
3. Step 3: Cross multiply
   9,316.72x = 12,857.18 × 5,125
4. Step 4: Simplify right side
   9,316.72x = 65,893,047.50
5. Step 5: Solve for x
   x = 65,893,047.50/9,316.72
6. Step 6: Final answer
   x = 7,072.56