Finding the Fourth Proportional to 2,632.15, 3,948.45 and 900.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.15 : 3,948.45 = 900.78 : x
2. Step 2: Convert to fraction form
   2,632.15/3,948.45 = 900.78/x
3. Step 3: Cross multiply
   2,632.15x = 3,948.45 × 900.78
4. Step 4: Simplify right side
   2,632.15x = 3,556,665.05
5. Step 5: Solve for x
   x = 3,556,665.05/2,632.15
6. Step 6: Final answer
   x = 1,351.24