Finding the Fourth Proportional to 78.68, 117.83 and 46.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78.68 : 117.83 = 46.55 : x
2. Step 2: Convert to fraction form
   78.68/117.83 = 46.55/x
3. Step 3: Cross multiply
   78.68x = 117.83 × 46.55
4. Step 4: Simplify right side
   78.68x = 5,484.51
5. Step 5: Solve for x
   x = 5,484.51/78.68
6. Step 6: Final answer
   x = 69.71