Finding the Fourth Proportional to 2,179.31, 3,280.61 and 1,877.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.31 : 3,280.61 = 1,877.89 : x
2. Step 2: Convert to fraction form
   2,179.31/3,280.61 = 1,877.89/x
3. Step 3: Cross multiply
   2,179.31x = 3,280.61 × 1,877.89
4. Step 4: Simplify right side
   2,179.31x = 6,160,624.71
5. Step 5: Solve for x
   x = 6,160,624.71/2,179.31
6. Step 6: Final answer
   x = 2,826.87