Finding the Fourth Proportional to 79.42, 109.56 and 53.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79.42 : 109.56 = 53.50 : x
2. Step 2: Convert to fraction form
   79.42/109.56 = 53.50/x
3. Step 3: Cross multiply
   79.42x = 109.56 × 53.50
4. Step 4: Simplify right side
   79.42x = 5,861.46
5. Step 5: Solve for x
   x = 5,861.46/79.42
6. Step 6: Final answer
   x = 73.80