Finding the Fourth Proportional to 73.01, 100.79 and 56.72

Step by Step Solution

1. Step 1: Write the proportion equation
   73.01 : 100.79 = 56.72 : x
2. Step 2: Convert to fraction form
   73.01/100.79 = 56.72/x
3. Step 3: Cross multiply
   73.01x = 100.79 × 56.72
4. Step 4: Simplify right side
   73.01x = 5,716.02
5. Step 5: Solve for x
   x = 5,716.02/73.01
6. Step 6: Final answer
   x = 78.30