Finding the Fourth Proportional to 1,451.63, 2,003.21 and 862.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.63 : 2,003.21 = 862.15 : x
2. Step 2: Convert to fraction form
   1,451.63/2,003.21 = 862.15/x
3. Step 3: Cross multiply
   1,451.63x = 2,003.21 × 862.15
4. Step 4: Simplify right side
   1,451.63x = 1,727,067.50
5. Step 5: Solve for x
   x = 1,727,067.50/1,451.63
6. Step 6: Final answer
   x = 1,189.74