Finding the Fourth Proportional to 1,339.74, 1,850.31 and 899.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.74 : 1,850.31 = 899.46 : x
2. Step 2: Convert to fraction form
   1,339.74/1,850.31 = 899.46/x
3. Step 3: Cross multiply
   1,339.74x = 1,850.31 × 899.46
4. Step 4: Simplify right side
   1,339.74x = 1,664,279.83
5. Step 5: Solve for x
   x = 1,664,279.83/1,339.74
6. Step 6: Final answer
   x = 1,242.24