Finding the Fourth Proportional to 4,188.42, 5,787.72 and 3,191.94

Step by Step Solution

1. Step 1: Write the proportion equation
   4,188.42 : 5,787.72 = 3,191.94 : x
2. Step 2: Convert to fraction form
   4,188.42/5,787.72 = 3,191.94/x
3. Step 3: Cross multiply
   4,188.42x = 5,787.72 × 3,191.94
4. Step 4: Simplify right side
   4,188.42x = 18,474,054.98
5. Step 5: Solve for x
   x = 18,474,054.98/4,188.42
6. Step 6: Final answer
   x = 4,410.75