Finding the Fourth Proportional to 1,489.83, 2,055.31 and 900.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.83 : 2,055.31 = 900.02 : x
2. Step 2: Convert to fraction form
   1,489.83/2,055.31 = 900.02/x
3. Step 3: Cross multiply
   1,489.83x = 2,055.31 × 900.02
4. Step 4: Simplify right side
   1,489.83x = 1,849,820.11
5. Step 5: Solve for x
   x = 1,849,820.11/1,489.83
6. Step 6: Final answer
   x = 1,241.63