Finding the Fourth Proportional to 2,124.69, 3,188.38 and 826.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.69 : 3,188.38 = 826.26 : x
2. Step 2: Convert to fraction form
   2,124.69/3,188.38 = 826.26/x
3. Step 3: Cross multiply
   2,124.69x = 3,188.38 × 826.26
4. Step 4: Simplify right side
   2,124.69x = 2,634,430.86
5. Step 5: Solve for x
   x = 2,634,430.86/2,124.69
6. Step 6: Final answer
   x = 1,239.91