Finding the Fourth Proportional to 67.03, 100.56 and 56.99

Step by Step Solution

1. Step 1: Write the proportion equation
   67.03 : 100.56 = 56.99 : x
2. Step 2: Convert to fraction form
   67.03/100.56 = 56.99/x
3. Step 3: Cross multiply
   67.03x = 100.56 × 56.99
4. Step 4: Simplify right side
   67.03x = 5,730.91
5. Step 5: Solve for x
   x = 5,730.91/67.03
6. Step 6: Final answer
   x = 85.50