Finding the Fourth Proportional to 103.49, 142.71 and 70.69

Step by Step Solution

1. Step 1: Write the proportion equation
   103.49 : 142.71 = 70.69 : x
2. Step 2: Convert to fraction form
   103.49/142.71 = 70.69/x
3. Step 3: Cross multiply
   103.49x = 142.71 × 70.69
4. Step 4: Simplify right side
   103.49x = 10,088.17
5. Step 5: Solve for x
   x = 10,088.17/103.49
6. Step 6: Final answer
   x = 97.48