Finding the Fourth Proportional to 12,778.25, 17,631.33 and 7,472.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,778.25 : 17,631.33 = 7,472.04 : x
2. Step 2: Convert to fraction form
   12,778.25/17,631.33 = 7,472.04/x
3. Step 3: Cross multiply
   12,778.25x = 17,631.33 × 7,472.04
4. Step 4: Simplify right side
   12,778.25x = 131,742,003.01
5. Step 5: Solve for x
   x = 131,742,003.01/12,778.25
6. Step 6: Final answer
   x = 10,309.86