Finding the Fourth Proportional to 72.25, 108.12 and 52.00

Step by Step Solution

1. Step 1: Write the proportion equation
   72.25 : 108.12 = 52.00 : x
2. Step 2: Convert to fraction form
   72.25/108.12 = 52.00/x
3. Step 3: Cross multiply
   72.25x = 108.12 × 52.00
4. Step 4: Simplify right side
   72.25x = 5,621.44
5. Step 5: Solve for x
   x = 5,621.44/72.25
6. Step 6: Final answer
   x = 77.81