Finding the Fourth Proportional to 78.59, 117.88 and 46.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78.59 : 117.88 = 46.50 : x
2. Step 2: Convert to fraction form
   78.59/117.88 = 46.50/x
3. Step 3: Cross multiply
   78.59x = 117.88 × 46.50
4. Step 4: Simplify right side
   78.59x = 5,481.42
5. Step 5: Solve for x
   x = 5,481.42/78.59
6. Step 6: Final answer
   x = 69.75