Finding the Fourth Proportional to 1,451.25, 2,002.59 and 861.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.25 : 2,002.59 = 861.93 : x
2. Step 2: Convert to fraction form
   1,451.25/2,002.59 = 861.93/x
3. Step 3: Cross multiply
   1,451.25x = 2,002.59 × 861.93
4. Step 4: Simplify right side
   1,451.25x = 1,726,092.40
5. Step 5: Solve for x
   x = 1,726,092.40/1,451.25
6. Step 6: Final answer
   x = 1,189.38