Finding the Fourth Proportional to 2,631.88, 3,943.50 and 899.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.88 : 3,943.50 = 899.56 : x
2. Step 2: Convert to fraction form
   2,631.88/3,943.50 = 899.56/x
3. Step 3: Cross multiply
   2,631.88x = 3,943.50 × 899.56
4. Step 4: Simplify right side
   2,631.88x = 3,547,414.86
5. Step 5: Solve for x
   x = 3,547,414.86/2,631.88
6. Step 6: Final answer
   x = 1,347.86