Finding the Fourth Proportional to 78.61, 117.88 and 24.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78.61 : 117.88 = 24.49 : x
2. Step 2: Convert to fraction form
   78.61/117.88 = 24.49/x
3. Step 3: Cross multiply
   78.61x = 117.88 × 24.49
4. Step 4: Simplify right side
   78.61x = 2,886.17
5. Step 5: Solve for x
   x = 2,886.17/78.61
6. Step 6: Final answer
   x = 36.72