Finding the Fourth Proportional to 73.10, 100.78 and 59.27

Step by Step Solution

1. Step 1: Write the proportion equation
   73.10 : 100.78 = 59.27 : x
2. Step 2: Convert to fraction form
   73.10/100.78 = 59.27/x
3. Step 3: Cross multiply
   73.10x = 100.78 × 59.27
4. Step 4: Simplify right side
   73.10x = 5,972.58
5. Step 5: Solve for x
   x = 5,972.58/73.10
6. Step 6: Final answer
   x = 81.70