Finding the Fourth Proportional to 2,381.03, 3,569.49 and 921.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.03 : 3,569.49 = 921.20 : x
2. Step 2: Convert to fraction form
   2,381.03/3,569.49 = 921.20/x
3. Step 3: Cross multiply
   2,381.03x = 3,569.49 × 921.20
4. Step 4: Simplify right side
   2,381.03x = 3,288,196.34
5. Step 5: Solve for x
   x = 3,288,196.34/2,381.03
6. Step 6: Final answer
   x = 1,381.00