Finding the Fourth Proportional to 2,890.32, 4,339.32 and 2,790.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,890.32 : 4,339.32 = 2,790.48 : x
2. Step 2: Convert to fraction form
   2,890.32/4,339.32 = 2,790.48/x
3. Step 3: Cross multiply
   2,890.32x = 4,339.32 × 2,790.48
4. Step 4: Simplify right side
   2,890.32x = 12,108,785.67
5. Step 5: Solve for x
   x = 12,108,785.67/2,890.32
6. Step 6: Final answer
   x = 4,189.43