Finding the Fourth Proportional to 1,341.72, 1,849.83 and 921.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.72 : 1,849.83 = 921.30 : x
2. Step 2: Convert to fraction form
   1,341.72/1,849.83 = 921.30/x
3. Step 3: Cross multiply
   1,341.72x = 1,849.83 × 921.30
4. Step 4: Simplify right side
   1,341.72x = 1,704,248.38
5. Step 5: Solve for x
   x = 1,704,248.38/1,341.72
6. Step 6: Final answer
   x = 1,270.20