Finding the Fourth Proportional to 2,102.54, 2,900.98 and 1,355.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,102.54 : 2,900.98 = 1,355.60 : x
2. Step 2: Convert to fraction form
   2,102.54/2,900.98 = 1,355.60/x
3. Step 3: Cross multiply
   2,102.54x = 2,900.98 × 1,355.60
4. Step 4: Simplify right side
   2,102.54x = 3,932,550.59
5. Step 5: Solve for x
   x = 3,932,550.59/2,102.54
6. Step 6: Final answer
   x = 1,870.39