Finding the Fourth Proportional to 1,363.69, 1,882.34 and 921.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.69 : 1,882.34 = 921.43 : x
2. Step 2: Convert to fraction form
   1,363.69/1,882.34 = 921.43/x
3. Step 3: Cross multiply
   1,363.69x = 1,882.34 × 921.43
4. Step 4: Simplify right side
   1,363.69x = 1,734,444.55
5. Step 5: Solve for x
   x = 1,734,444.55/1,363.69
6. Step 6: Final answer
   x = 1,271.88