Finding the Fourth Proportional to 1,451.47, 2,002.98 and 861.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.47 : 2,002.98 = 861.67 : x
2. Step 2: Convert to fraction form
   1,451.47/2,002.98 = 861.67/x
3. Step 3: Cross multiply
   1,451.47x = 2,002.98 × 861.67
4. Step 4: Simplify right side
   1,451.47x = 1,725,907.78
5. Step 5: Solve for x
   x = 1,725,907.78/1,451.47
6. Step 6: Final answer
   x = 1,189.08