Finding the Fourth Proportional to 1,423.04, 1,965.34 and 899.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.04 : 1,965.34 = 899.38 : x
2. Step 2: Convert to fraction form
   1,423.04/1,965.34 = 899.38/x
3. Step 3: Cross multiply
   1,423.04x = 1,965.34 × 899.38
4. Step 4: Simplify right side
   1,423.04x = 1,767,587.49
5. Step 5: Solve for x
   x = 1,767,587.49/1,423.04
6. Step 6: Final answer
   x = 1,242.12