Finding the Fourth Proportional to 1,490.31, 2,055.51 and 900.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.31 : 2,055.51 = 900.09 : x
2. Step 2: Convert to fraction form
   1,490.31/2,055.51 = 900.09/x
3. Step 3: Cross multiply
   1,490.31x = 2,055.51 × 900.09
4. Step 4: Simplify right side
   1,490.31x = 1,850,144.00
5. Step 5: Solve for x
   x = 1,850,144.00/1,490.31
6. Step 6: Final answer
   x = 1,241.45