Finding the Fourth Proportional to 1,539.89, 2,124.83 and 876.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,539.89 : 2,124.83 = 876.67 : x
2. Step 2: Convert to fraction form
   1,539.89/2,124.83 = 876.67/x
3. Step 3: Cross multiply
   1,539.89x = 2,124.83 × 876.67
4. Step 4: Simplify right side
   1,539.89x = 1,862,771.60
5. Step 5: Solve for x
   x = 1,862,771.60/1,539.89
6. Step 6: Final answer
   x = 1,209.68