Finding the Fourth Proportional to 2,124.89, 3,188.55 and 826.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.89 : 3,188.55 = 826.19 : x
2. Step 2: Convert to fraction form
   2,124.89/3,188.55 = 826.19/x
3. Step 3: Cross multiply
   2,124.89x = 3,188.55 × 826.19
4. Step 4: Simplify right side
   2,124.89x = 2,634,348.12
5. Step 5: Solve for x
   x = 2,634,348.12/2,124.89
6. Step 6: Final answer
   x = 1,239.76