Finding the Fourth Proportional to 2,653.89, 3,980.82 and 922.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,653.89 : 3,980.82 = 922.50 : x
2. Step 2: Convert to fraction form
   2,653.89/3,980.82 = 922.50/x
3. Step 3: Cross multiply
   2,653.89x = 3,980.82 × 922.50
4. Step 4: Simplify right side
   2,653.89x = 3,672,306.45
5. Step 5: Solve for x
   x = 3,672,306.45/2,653.89
6. Step 6: Final answer
   x = 1,383.74