Finding the Fourth Proportional to 72.99, 109.56 and 45.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72.99 : 109.56 = 45.96 : x
2. Step 2: Convert to fraction form
   72.99/109.56 = 45.96/x
3. Step 3: Cross multiply
   72.99x = 109.56 × 45.96
4. Step 4: Simplify right side
   72.99x = 5,035.38
5. Step 5: Solve for x
   x = 5,035.38/72.99
6. Step 6: Final answer
   x = 68.99