Finding the Fourth Proportional to 78.86, 108.83 and 45.67

Step by Step Solution

1. Step 1: Write the proportion equation
   78.86 : 108.83 = 45.67 : x
2. Step 2: Convert to fraction form
   78.86/108.83 = 45.67/x
3. Step 3: Cross multiply
   78.86x = 108.83 × 45.67
4. Step 4: Simplify right side
   78.86x = 4,970.02
5. Step 5: Solve for x
   x = 4,970.02/78.86
6. Step 6: Final answer
   x = 63.02