Finding the Fourth Proportional to 1,489.81, 2,055.61 and 900.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.81 : 2,055.61 = 900.34 : x
2. Step 2: Convert to fraction form
   1,489.81/2,055.61 = 900.34/x
3. Step 3: Cross multiply
   1,489.81x = 2,055.61 × 900.34
4. Step 4: Simplify right side
   1,489.81x = 1,850,747.91
5. Step 5: Solve for x
   x = 1,850,747.91/1,489.81
6. Step 6: Final answer
   x = 1,242.27