Finding the Fourth Proportional to 2,652.72, 3,979.89 and 922.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,652.72 : 3,979.89 = 922.56 : x
2. Step 2: Convert to fraction form
   2,652.72/3,979.89 = 922.56/x
3. Step 3: Cross multiply
   2,652.72x = 3,979.89 × 922.56
4. Step 4: Simplify right side
   2,652.72x = 3,671,687.32
5. Step 5: Solve for x
   x = 3,671,687.32/2,652.72
6. Step 6: Final answer
   x = 1,384.12