Finding the Fourth Proportional to 100.17, 138.15 and 73.96

Step by Step Solution

1. Step 1: Write the proportion equation
   100.17 : 138.15 = 73.96 : x
2. Step 2: Convert to fraction form
   100.17/138.15 = 73.96/x
3. Step 3: Cross multiply
   100.17x = 138.15 × 73.96
4. Step 4: Simplify right side
   100.17x = 10,217.23
5. Step 5: Solve for x
   x = 10,217.23/100.17
6. Step 6: Final answer
   x = 102.00