Finding the Fourth Proportional to 4,123.84, 5,693.61 and 2,780.56

Step by Step Solution

1. Step 1: Write the proportion equation
   4,123.84 : 5,693.61 = 2,780.56 : x
2. Step 2: Convert to fraction form
   4,123.84/5,693.61 = 2,780.56/x
3. Step 3: Cross multiply
   4,123.84x = 5,693.61 × 2,780.56
4. Step 4: Simplify right side
   4,123.84x = 15,831,424.22
5. Step 5: Solve for x
   x = 15,831,424.22/4,123.84
6. Step 6: Final answer
   x = 3,839.00