Finding the Fourth Proportional to 1,003.59, 1,506.60 and 899.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.59 : 1,506.60 = 899.10 : x
2. Step 2: Convert to fraction form
   1,003.59/1,506.60 = 899.10/x
3. Step 3: Cross multiply
   1,003.59x = 1,506.60 × 899.10
4. Step 4: Simplify right side
   1,003.59x = 1,354,584.06
5. Step 5: Solve for x
   x = 1,354,584.06/1,003.59
6. Step 6: Final answer
   x = 1,349.74