Finding the Fourth Proportional to 1,072.62, 1,480.71 and 899.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.62 : 1,480.71 = 899.34 : x
2. Step 2: Convert to fraction form
   1,072.62/1,480.71 = 899.34/x
3. Step 3: Cross multiply
   1,072.62x = 1,480.71 × 899.34
4. Step 4: Simplify right side
   1,072.62x = 1,331,661.73
5. Step 5: Solve for x
   x = 1,331,661.73/1,072.62
6. Step 6: Final answer
   x = 1,241.50