Finding the Fourth Proportional to 103.52, 142.70 and 74.00

Step by Step Solution

1. Step 1: Write the proportion equation
   103.52 : 142.70 = 74.00 : x
2. Step 2: Convert to fraction form
   103.52/142.70 = 74.00/x
3. Step 3: Cross multiply
   103.52x = 142.70 × 74.00
4. Step 4: Simplify right side
   103.52x = 10,558.72
5. Step 5: Solve for x
   x = 10,558.72/103.52
6. Step 6: Final answer
   x = 102.00