Finding the Fourth Proportional to 1,555.98, 2,344.50 and 1,288.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.98 : 2,344.50 = 1,288.08 : x
2. Step 2: Convert to fraction form
   1,555.98/2,344.50 = 1,288.08/x
3. Step 3: Cross multiply
   1,555.98x = 2,344.50 × 1,288.08
4. Step 4: Simplify right side
   1,555.98x = 3,019,903.56
5. Step 5: Solve for x
   x = 3,019,903.56/1,555.98
6. Step 6: Final answer
   x = 1,940.84