Finding the Fourth Proportional to 12,807.72, 17,675.46 and 7,219.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.72 : 17,675.46 = 7,219.08 : x
2. Step 2: Convert to fraction form
   12,807.72/17,675.46 = 7,219.08/x
3. Step 3: Cross multiply
   12,807.72x = 17,675.46 × 7,219.08
4. Step 4: Simplify right side
   12,807.72x = 127,600,559.78
5. Step 5: Solve for x
   x = 127,600,559.78/12,807.72
6. Step 6: Final answer
   x = 9,962.78