Finding the Fourth Proportional to 78.57, 108.43 and 43.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78.57 : 108.43 = 43.61 : x
2. Step 2: Convert to fraction form
   78.57/108.43 = 43.61/x
3. Step 3: Cross multiply
   78.57x = 108.43 × 43.61
4. Step 4: Simplify right side
   78.57x = 4,728.10
5. Step 5: Solve for x
   x = 4,728.10/78.57
6. Step 6: Final answer
   x = 60.18