Finding the Fourth Proportional to 2,631.88, 3,948.42 and 900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.88 : 3,948.42 = 900.50 : x
2. Step 2: Convert to fraction form
   2,631.88/3,948.42 = 900.50/x
3. Step 3: Cross multiply
   2,631.88x = 3,948.42 × 900.50
4. Step 4: Simplify right side
   2,631.88x = 3,555,552.21
5. Step 5: Solve for x
   x = 3,555,552.21/2,631.88
6. Step 6: Final answer
   x = 1,350.96