Finding the Fourth Proportional to 1,940.87, 2,908.89 and 899.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.87 : 2,908.89 = 899.45 : x
2. Step 2: Convert to fraction form
   1,940.87/2,908.89 = 899.45/x
3. Step 3: Cross multiply
   1,940.87x = 2,908.89 × 899.45
4. Step 4: Simplify right side
   1,940.87x = 2,616,401.11
5. Step 5: Solve for x
   x = 2,616,401.11/1,940.87
6. Step 6: Final answer
   x = 1,348.06