Finding the Fourth Proportional to 1,423.71, 1,963.80 and 900.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.71 : 1,963.80 = 900.09 : x
2. Step 2: Convert to fraction form
   1,423.71/1,963.80 = 900.09/x
3. Step 3: Cross multiply
   1,423.71x = 1,963.80 × 900.09
4. Step 4: Simplify right side
   1,423.71x = 1,767,596.74
5. Step 5: Solve for x
   x = 1,767,596.74/1,423.71
6. Step 6: Final answer
   x = 1,241.54