Finding the Fourth Proportional to 4,919.28, 7,381.68 and 2,610.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,919.28 : 7,381.68 = 2,610.72 : x
2. Step 2: Convert to fraction form
   4,919.28/7,381.68 = 2,610.72/x
3. Step 3: Cross multiply
   4,919.28x = 7,381.68 × 2,610.72
4. Step 4: Simplify right side
   4,919.28x = 19,271,499.61
5. Step 5: Solve for x
   x = 19,271,499.61/4,919.28
6. Step 6: Final answer
   x = 3,917.54