Finding the Fourth Proportional to 1,539.58, 2,124.61 and 876.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,539.58 : 2,124.61 = 876.43 : x
2. Step 2: Convert to fraction form
   1,539.58/2,124.61 = 876.43/x
3. Step 3: Cross multiply
   1,539.58x = 2,124.61 × 876.43
4. Step 4: Simplify right side
   1,539.58x = 1,862,061.32
5. Step 5: Solve for x
   x = 1,862,061.32/1,539.58
6. Step 6: Final answer
   x = 1,209.46