Finding the Fourth Proportional to 1,454.42, 2,003.97 and 987.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,454.42 : 2,003.97 = 987.86 : x
2. Step 2: Convert to fraction form
   1,454.42/2,003.97 = 987.86/x
3. Step 3: Cross multiply
   1,454.42x = 2,003.97 × 987.86
4. Step 4: Simplify right side
   1,454.42x = 1,979,641.80
5. Step 5: Solve for x
   x = 1,979,641.80/1,454.42
6. Step 6: Final answer
   x = 1,361.12