Finding the Fourth Proportional to 100.01, 138.02 and 73.88

Step by Step Solution

1. Step 1: Write the proportion equation
   100.01 : 138.02 = 73.88 : x
2. Step 2: Convert to fraction form
   100.01/138.02 = 73.88/x
3. Step 3: Cross multiply
   100.01x = 138.02 × 73.88
4. Step 4: Simplify right side
   100.01x = 10,196.89
5. Step 5: Solve for x
   x = 10,196.89/100.01
6. Step 6: Final answer
   x = 101.96