Finding the Fourth Proportional to 2,439.56, 3,366.61 and 1,320.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.56 : 3,366.61 = 1,320.52 : x
2. Step 2: Convert to fraction form
   2,439.56/3,366.61 = 1,320.52/x
3. Step 3: Cross multiply
   2,439.56x = 3,366.61 × 1,320.52
4. Step 4: Simplify right side
   2,439.56x = 4,445,657.81
5. Step 5: Solve for x
   x = 4,445,657.81/2,439.56
6. Step 6: Final answer
   x = 1,822.32