Finding the Fourth Proportional to 2,439.60, 3,661.46 and 1,053.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.60 : 3,661.46 = 1,053.99 : x
2. Step 2: Convert to fraction form
   2,439.60/3,661.46 = 1,053.99/x
3. Step 3: Cross multiply
   2,439.60x = 3,661.46 × 1,053.99
4. Step 4: Simplify right side
   2,439.60x = 3,859,123.22
5. Step 5: Solve for x
   x = 3,859,123.22/2,439.60
6. Step 6: Final answer
   x = 1,581.87