Finding the Fourth Proportional to 3,909.60, 5,867.46 and 2,061.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909.60 : 5,867.46 = 2,061.80 : x
2. Step 2: Convert to fraction form
   3,909.60/5,867.46 = 2,061.80/x
3. Step 3: Cross multiply
   3,909.60x = 5,867.46 × 2,061.80
4. Step 4: Simplify right side
   3,909.60x = 12,097,529.03
5. Step 5: Solve for x
   x = 12,097,529.03/3,909.60
6. Step 6: Final answer
   x = 3,094.31