Finding the Fourth Proportional to 2,439.60, 3,656.78 and 1,053.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.60 : 3,656.78 = 1,053.59 : x
2. Step 2: Convert to fraction form
   2,439.60/3,656.78 = 1,053.59/x
3. Step 3: Cross multiply
   2,439.60x = 3,656.78 × 1,053.59
4. Step 4: Simplify right side
   2,439.60x = 3,852,737.00
5. Step 5: Solve for x
   x = 3,852,737.00/2,439.60
6. Step 6: Final answer
   x = 1,579.25