Finding the Fourth Proportional to 1,598.78, 2,206.29 and 900.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,598.78 : 2,206.29 = 900.16 : x
2. Step 2: Convert to fraction form
   1,598.78/2,206.29 = 900.16/x
3. Step 3: Cross multiply
   1,598.78x = 2,206.29 × 900.16
4. Step 4: Simplify right side
   1,598.78x = 1,986,008.49
5. Step 5: Solve for x
   x = 1,986,008.49/1,598.78
6. Step 6: Final answer
   x = 1,242.20