Finding the Fourth Proportional to 2,635.82, 3,953.39 and 688.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.82 : 3,953.39 = 688.17 : x
2. Step 2: Convert to fraction form
   2,635.82/3,953.39 = 688.17/x
3. Step 3: Cross multiply
   2,635.82x = 3,953.39 × 688.17
4. Step 4: Simplify right side
   2,635.82x = 2,720,600.96
5. Step 5: Solve for x
   x = 2,720,600.96/2,635.82
6. Step 6: Final answer
   x = 1,032.17