Finding the Fourth Proportional to 9,003.40, 12,419.70 and 5,276.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,003.40 : 12,419.70 = 5,276.68 : x
2. Step 2: Convert to fraction form
   9,003.40/12,419.70 = 5,276.68/x
3. Step 3: Cross multiply
   9,003.40x = 12,419.70 × 5,276.68
4. Step 4: Simplify right side
   9,003.40x = 65,534,782.60
5. Step 5: Solve for x
   x = 65,534,782.60/9,003.40
6. Step 6: Final answer
   x = 7,278.89