Finding the Fourth Proportional to 2,146.85, 2,970.72 and 1,831.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.85 : 2,970.72 = 1,831.61 : x
2. Step 2: Convert to fraction form
   2,146.85/2,970.72 = 1,831.61/x
3. Step 3: Cross multiply
   2,146.85x = 2,970.72 × 1,831.61
4. Step 4: Simplify right side
   2,146.85x = 5,441,200.46
5. Step 5: Solve for x
   x = 5,441,200.46/2,146.85
6. Step 6: Final answer
   x = 2,534.50