Finding the Fourth Proportional to 2,470.90, 3,688.31 and 2,159.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,470.90 : 3,688.31 = 2,159.50 : x
2. Step 2: Convert to fraction form
   2,470.90/3,688.31 = 2,159.50/x
3. Step 3: Cross multiply
   2,470.90x = 3,688.31 × 2,159.50
4. Step 4: Simplify right side
   2,470.90x = 7,964,905.45
5. Step 5: Solve for x
   x = 7,964,905.45/2,470.90
6. Step 6: Final answer
   x = 3,223.48