Finding the Fourth Proportional to 2,149.35, 3,224.39 and 688.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,149.35 : 3,224.39 = 688.47 : x
2. Step 2: Convert to fraction form
   2,149.35/3,224.39 = 688.47/x
3. Step 3: Cross multiply
   2,149.35x = 3,224.39 × 688.47
4. Step 4: Simplify right side
   2,149.35x = 2,219,892.34
5. Step 5: Solve for x
   x = 2,219,892.34/2,149.35
6. Step 6: Final answer
   x = 1,032.82