Finding the Fourth Proportional to 56.72, 78.23 and 35.99

Step by Step Solution

1. Step 1: Write the proportion equation
   56.72 : 78.23 = 35.99 : x
2. Step 2: Convert to fraction form
   56.72/78.23 = 35.99/x
3. Step 3: Cross multiply
   56.72x = 78.23 × 35.99
4. Step 4: Simplify right side
   56.72x = 2,815.50
5. Step 5: Solve for x
   x = 2,815.50/56.72
6. Step 6: Final answer
   x = 49.64