Finding the Fourth Proportional to 9,051.12, 12,491.78 and 5,275.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.12 : 12,491.78 = 5,275.49 : x
2. Step 2: Convert to fraction form
   9,051.12/12,491.78 = 5,275.49/x
3. Step 3: Cross multiply
   9,051.12x = 12,491.78 × 5,275.49
4. Step 4: Simplify right side
   9,051.12x = 65,900,171.64
5. Step 5: Solve for x
   x = 65,900,171.64/9,051.12
6. Step 6: Final answer
   x = 7,280.89