Finding the Fourth Proportional to 78.48, 117.69 and 37.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78.48 : 117.69 = 37.88 : x
2. Step 2: Convert to fraction form
   78.48/117.69 = 37.88/x
3. Step 3: Cross multiply
   78.48x = 117.69 × 37.88
4. Step 4: Simplify right side
   78.48x = 4,458.10
5. Step 5: Solve for x
   x = 4,458.10/78.48
6. Step 6: Final answer
   x = 56.81