Finding the Fourth Proportional to 72.56, 99.94 and 53.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72.56 : 99.94 = 53.12 : x
2. Step 2: Convert to fraction form
   72.56/99.94 = 53.12/x
3. Step 3: Cross multiply
   72.56x = 99.94 × 53.12
4. Step 4: Simplify right side
   72.56x = 5,308.81
5. Step 5: Solve for x
   x = 5,308.81/72.56
6. Step 6: Final answer
   x = 73.16