Finding the Fourth Proportional to 72.77, 100.49 and 50.99

Step by Step Solution

1. Step 1: Write the proportion equation
   72.77 : 100.49 = 50.99 : x
2. Step 2: Convert to fraction form
   72.77/100.49 = 50.99/x
3. Step 3: Cross multiply
   72.77x = 100.49 × 50.99
4. Step 4: Simplify right side
   72.77x = 5,123.23
5. Step 5: Solve for x
   x = 5,123.23/72.77
6. Step 6: Final answer
   x = 70.41