Finding the Fourth Proportional to 1,599.05, 2,206.89 and 900.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,599.05 : 2,206.89 = 900.43 : x
2. Step 2: Convert to fraction form
   1,599.05/2,206.89 = 900.43/x
3. Step 3: Cross multiply
   1,599.05x = 2,206.89 × 900.43
4. Step 4: Simplify right side
   1,599.05x = 1,987,144.45
5. Step 5: Solve for x
   x = 1,987,144.45/1,599.05
6. Step 6: Final answer
   x = 1,242.70