Finding the Fourth Proportional to 1,371.57, 1,892.57 and 899.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.57 : 1,892.57 = 899.25 : x
2. Step 2: Convert to fraction form
   1,371.57/1,892.57 = 899.25/x
3. Step 3: Cross multiply
   1,371.57x = 1,892.57 × 899.25
4. Step 4: Simplify right side
   1,371.57x = 1,701,889.08
5. Step 5: Solve for x
   x = 1,701,889.08/1,371.57
6. Step 6: Final answer
   x = 1,240.83