Finding the Fourth Proportional to 2,919.31, 4,349.46 and 2,779.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,919.31 : 4,349.46 = 2,779.99 : x
2. Step 2: Convert to fraction form
   2,919.31/4,349.46 = 2,779.99/x
3. Step 3: Cross multiply
   2,919.31x = 4,349.46 × 2,779.99
4. Step 4: Simplify right side
   2,919.31x = 12,091,454.86
5. Step 5: Solve for x
   x = 12,091,454.86/2,919.31
6. Step 6: Final answer
   x = 4,141.89