Finding the Fourth Proportional to 103.10, 142.22 and 74.00

Step by Step Solution

1. Step 1: Write the proportion equation
   103.10 : 142.22 = 74.00 : x
2. Step 2: Convert to fraction form
   103.10/142.22 = 74.00/x
3. Step 3: Cross multiply
   103.10x = 142.22 × 74.00
4. Step 4: Simplify right side
   103.10x = 10,524.82
5. Step 5: Solve for x
   x = 10,524.82/103.10
6. Step 6: Final answer
   x = 102.09