Finding the Fourth Proportional to 5,559.37, 7,678.22 and 3,787.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,559.37 : 7,678.22 = 3,787.90 : x
2. Step 2: Convert to fraction form
   5,559.37/7,678.22 = 3,787.90/x
3. Step 3: Cross multiply
   5,559.37x = 7,678.22 × 3,787.90
4. Step 4: Simplify right side
   5,559.37x = 29,084,300.62
5. Step 5: Solve for x
   x = 29,084,300.62/5,559.37
6. Step 6: Final answer
   x = 5,231.59