Finding the Fourth Proportional to 72.94, 100.67 and 56.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72.94 : 100.67 = 56.56 : x
2. Step 2: Convert to fraction form
   72.94/100.67 = 56.56/x
3. Step 3: Cross multiply
   72.94x = 100.67 × 56.56
4. Step 4: Simplify right side
   72.94x = 5,693.90
5. Step 5: Solve for x
   x = 5,693.90/72.94
6. Step 6: Final answer
   x = 78.06