Finding the Fourth Proportional to 94.98, 131.10 and 78.72

Step by Step Solution

1. Step 1: Write the proportion equation
   94.98 : 131.10 = 78.72 : x
2. Step 2: Convert to fraction form
   94.98/131.10 = 78.72/x
3. Step 3: Cross multiply
   94.98x = 131.10 × 78.72
4. Step 4: Simplify right side
   94.98x = 10,320.19
5. Step 5: Solve for x
   x = 10,320.19/94.98
6. Step 6: Final answer
   x = 108.66