Finding the Fourth Proportional to 2,470.76, 3,411.47 and 1,587.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,470.76 : 3,411.47 = 1,587.05 : x
2. Step 2: Convert to fraction form
   2,470.76/3,411.47 = 1,587.05/x
3. Step 3: Cross multiply
   2,470.76x = 3,411.47 × 1,587.05
4. Step 4: Simplify right side
   2,470.76x = 5,414,160.37
5. Step 5: Solve for x
   x = 5,414,160.37/2,470.76
6. Step 6: Final answer
   x = 2,191.30