Finding the Third Proportional to 64.81 and 100.35

Step by Step Solution

1. Step 1: Write the proportion equation
   64.81 : 100.35 = 100.35 : x
2. Step 2: Convert to fraction form
   64.81/100.35 = 100.35/x
3. Step 3: Cross multiply
   64.81x = 100.35 × 100.35
4. Step 4: Simplify right side
   64.81x = 10,070.83
5. Step 5: Solve for x
   x = 10,070.83/64.81
6. Step 6: Final answer
   x = 155.39