Finding the Fourth Proportional to 78.50, 117.65 and 48.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78.50 : 117.65 = 48.03 : x
2. Step 2: Convert to fraction form
   78.50/117.65 = 48.03/x
3. Step 3: Cross multiply
   78.50x = 117.65 × 48.03
4. Step 4: Simplify right side
   78.50x = 5,650.49
5. Step 5: Solve for x
   x = 5,650.49/78.50
6. Step 6: Final answer
   x = 71.99