Finding the Fourth Proportional to 2,631.25, 3,947.55 and 899.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.25 : 3,947.55 = 899.88 : x
2. Step 2: Convert to fraction form
   2,631.25/3,947.55 = 899.88/x
3. Step 3: Cross multiply
   2,631.25x = 3,947.55 × 899.88
4. Step 4: Simplify right side
   2,631.25x = 3,552,321.29
5. Step 5: Solve for x
   x = 3,552,321.29/2,631.25
6. Step 6: Final answer
   x = 1,350.05