Finding the Fourth Proportional to 1,539.76, 2,124.91 and 876.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,539.76 : 2,124.91 = 876.72 : x
2. Step 2: Convert to fraction form
   1,539.76/2,124.91 = 876.72/x
3. Step 3: Cross multiply
   1,539.76x = 2,124.91 × 876.72
4. Step 4: Simplify right side
   1,539.76x = 1,862,951.10
5. Step 5: Solve for x
   x = 1,862,951.10/1,539.76
6. Step 6: Final answer
   x = 1,209.90