Finding the Fourth Proportional to 12,548.16, 17,307 and 7,830.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,548.16 : 17,307 = 7,830.72 : x
2. Step 2: Convert to fraction form
   12,548.16/17,307 = 7,830.72/x
3. Step 3: Cross multiply
   12,548.16x = 17,307 × 7,830.72
4. Step 4: Simplify right side
   12,548.16x = 135,526,271.04
5. Step 5: Solve for x
   x = 135,526,271.04/12,548.16
6. Step 6: Final answer
   x = 10,800.49