Finding the Fourth Proportional to 72.64, 108.50 and 52.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72.64 : 108.50 = 52.34 : x
2. Step 2: Convert to fraction form
   72.64/108.50 = 52.34/x
3. Step 3: Cross multiply
   72.64x = 108.50 × 52.34
4. Step 4: Simplify right side
   72.64x = 5,678.09
5. Step 5: Solve for x
   x = 5,678.09/72.64
6. Step 6: Final answer
   x = 78.17