Finding the Fourth Proportional to 1,987.00, 2,742.15 and 1,102.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.00 : 2,742.15 = 1,102.78 : x
2. Step 2: Convert to fraction form
   1,987.00/2,742.15 = 1,102.78/x
3. Step 3: Cross multiply
   1,987.00x = 2,742.15 × 1,102.78
4. Step 4: Simplify right side
   1,987.00x = 3,023,995.74
5. Step 5: Solve for x
   x = 3,023,995.74/1,987.00
6. Step 6: Final answer
   x = 1,521.89