Finding the Fourth Proportional to 1,598.28, 2,205.72 and 899.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,598.28 : 2,205.72 = 899.76 : x
2. Step 2: Convert to fraction form
   1,598.28/2,205.72 = 899.76/x
3. Step 3: Cross multiply
   1,598.28x = 2,205.72 × 899.76
4. Step 4: Simplify right side
   1,598.28x = 1,984,618.63
5. Step 5: Solve for x
   x = 1,984,618.63/1,598.28
6. Step 6: Final answer
   x = 1,241.72