Finding the Fourth Proportional to 2,124.50, 3,187.56 and 826.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.50 : 3,187.56 = 826.07 : x
2. Step 2: Convert to fraction form
   2,124.50/3,187.56 = 826.07/x
3. Step 3: Cross multiply
   2,124.50x = 3,187.56 × 826.07
4. Step 4: Simplify right side
   2,124.50x = 2,633,147.69
5. Step 5: Solve for x
   x = 2,633,147.69/2,124.50
6. Step 6: Final answer
   x = 1,239.42