Finding the Fourth Proportional to 2,632.35, 3,948.90 and 876.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.35 : 3,948.90 = 876.78 : x
2. Step 2: Convert to fraction form
   2,632.35/3,948.90 = 876.78/x
3. Step 3: Cross multiply
   2,632.35x = 3,948.90 × 876.78
4. Step 4: Simplify right side
   2,632.35x = 3,462,316.54
5. Step 5: Solve for x
   x = 3,462,316.54/2,632.35
6. Step 6: Final answer
   x = 1,315.29