Finding the Third Proportional to 71.81 and 100.13

Step by Step Solution

1. Step 1: Write the proportion equation
   71.81 : 100.13 = 100.13 : x
2. Step 2: Convert to fraction form
   71.81/100.13 = 100.13/x
3. Step 3: Cross multiply
   71.81x = 100.13 × 100.13
4. Step 4: Simplify right side
   71.81x = 10,025.02
5. Step 5: Solve for x
   x = 10,025.02/71.81
6. Step 6: Final answer
   x = 139.60