Finding the Fourth Proportional to 2,632.07, 3,947.68 and 878.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.07 : 3,947.68 = 878.30 : x
2. Step 2: Convert to fraction form
   2,632.07/3,947.68 = 878.30/x
3. Step 3: Cross multiply
   2,632.07x = 3,947.68 × 878.30
4. Step 4: Simplify right side
   2,632.07x = 3,467,247.34
5. Step 5: Solve for x
   x = 3,467,247.34/2,632.07
6. Step 6: Final answer
   x = 1,317.31