Finding the Fourth Proportional to 9,259.81, 12,775.35 and 5,278.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,259.81 : 12,775.35 = 5,278.04 : x
2. Step 2: Convert to fraction form
   9,259.81/12,775.35 = 5,278.04/x
3. Step 3: Cross multiply
   9,259.81x = 12,775.35 × 5,278.04
4. Step 4: Simplify right side
   9,259.81x = 67,428,808.31
5. Step 5: Solve for x
   x = 67,428,808.31/9,259.81
6. Step 6: Final answer
   x = 7,281.88