Finding the Fourth Proportional to 12,777.20, 17,632.56 and 7,472

Step by Step Solution

1. Step 1: Write the proportion equation
   12,777.20 : 17,632.56 = 7,472 : x
2. Step 2: Convert to fraction form
   12,777.20/17,632.56 = 7,472/x
3. Step 3: Cross multiply
   12,777.20x = 17,632.56 × 7,472
4. Step 4: Simplify right side
   12,777.20x = 131,750,488.32
5. Step 5: Solve for x
   x = 131,750,488.32/12,777.20
6. Step 6: Final answer
   x = 10,311.37