Finding the Fourth Proportional to 2,100.88, 2,899.74 and 1,355.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.88 : 2,899.74 = 1,355.68 : x
2. Step 2: Convert to fraction form
   2,100.88/2,899.74 = 1,355.68/x
3. Step 3: Cross multiply
   2,100.88x = 2,899.74 × 1,355.68
4. Step 4: Simplify right side
   2,100.88x = 3,931,119.52
5. Step 5: Solve for x
   x = 3,931,119.52/2,100.88
6. Step 6: Final answer
   x = 1,871.18