Finding the Fourth Proportional to 1,539.69, 2,124.89 and 876.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,539.69 : 2,124.89 = 876.75 : x
2. Step 2: Convert to fraction form
   1,539.69/2,124.89 = 876.75/x
3. Step 3: Cross multiply
   1,539.69x = 2,124.89 × 876.75
4. Step 4: Simplify right side
   1,539.69x = 1,862,997.31
5. Step 5: Solve for x
   x = 1,862,997.31/1,539.69
6. Step 6: Final answer
   x = 1,209.98