Finding the Fourth Proportional to 76.69, 105.82 and 45.61

Step by Step Solution

1. Step 1: Write the proportion equation
   76.69 : 105.82 = 45.61 : x
2. Step 2: Convert to fraction form
   76.69/105.82 = 45.61/x
3. Step 3: Cross multiply
   76.69x = 105.82 × 45.61
4. Step 4: Simplify right side
   76.69x = 4,826.45
5. Step 5: Solve for x
   x = 4,826.45/76.69
6. Step 6: Final answer
   x = 62.93