Finding the Fourth Proportional to 2,332.81, 3,498.15 and 688.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,332.81 : 3,498.15 = 688.78 : x
2. Step 2: Convert to fraction form
   2,332.81/3,498.15 = 688.78/x
3. Step 3: Cross multiply
   2,332.81x = 3,498.15 × 688.78
4. Step 4: Simplify right side
   2,332.81x = 2,409,455.76
5. Step 5: Solve for x
   x = 2,409,455.76/2,332.81
6. Step 6: Final answer
   x = 1,032.86