Finding the Fourth Proportional to 5,551.20, 7,654.50 and 3,783.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,551.20 : 7,654.50 = 3,783.78 : x
2. Step 2: Convert to fraction form
   5,551.20/7,654.50 = 3,783.78/x
3. Step 3: Cross multiply
   5,551.20x = 7,654.50 × 3,783.78
4. Step 4: Simplify right side
   5,551.20x = 28,962,944.01
5. Step 5: Solve for x
   x = 28,962,944.01/5,551.20
6. Step 6: Final answer
   x = 5,217.42