Finding the Fourth Proportional to 72.34, 99.84 and 50.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72.34 : 99.84 = 50.56 : x
2. Step 2: Convert to fraction form
   72.34/99.84 = 50.56/x
3. Step 3: Cross multiply
   72.34x = 99.84 × 50.56
4. Step 4: Simplify right side
   72.34x = 5,047.91
5. Step 5: Solve for x
   x = 5,047.91/72.34
6. Step 6: Final answer
   x = 69.78