Finding the Fourth Proportional to 9,279.42, 13,921.40 and 3,039.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.42 : 13,921.40 = 3,039.76 : x
2. Step 2: Convert to fraction form
   9,279.42/13,921.40 = 3,039.76/x
3. Step 3: Cross multiply
   9,279.42x = 13,921.40 × 3,039.76
4. Step 4: Simplify right side
   9,279.42x = 42,317,714.86
5. Step 5: Solve for x
   x = 42,317,714.86/9,279.42
6. Step 6: Final answer
   x = 4,560.38