Finding the Fourth Proportional to 52.72, 72.72 and 31.99

Step by Step Solution

1. Step 1: Write the proportion equation
   52.72 : 72.72 = 31.99 : x
2. Step 2: Convert to fraction form
   52.72/72.72 = 31.99/x
3. Step 3: Cross multiply
   52.72x = 72.72 × 31.99
4. Step 4: Simplify right side
   52.72x = 2,326.31
5. Step 5: Solve for x
   x = 2,326.31/52.72
6. Step 6: Final answer
   x = 44.13