Finding the Fourth Proportional to 2,632.61, 3,948.59 and 684.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.61 : 3,948.59 = 684.77 : x
2. Step 2: Convert to fraction form
   2,632.61/3,948.59 = 684.77/x
3. Step 3: Cross multiply
   2,632.61x = 3,948.59 × 684.77
4. Step 4: Simplify right side
   2,632.61x = 2,703,852.81
5. Step 5: Solve for x
   x = 2,703,852.81/2,632.61
6. Step 6: Final answer
   x = 1,027.06