Finding the Third Proportional to 42,720.75 and 64,081.13

Step by Step Solution

1. Step 1: Write the proportion equation
   42,720.75 : 64,081.13 = 64,081.13 : x
2. Step 2: Convert to fraction form
   42,720.75/64,081.13 = 64,081.13/x
3. Step 3: Cross multiply
   42,720.75x = 64,081.13 × 64,081.13
4. Step 4: Simplify right side
   42,720.75x = 4,106,390,581.27
5. Step 5: Solve for x
   x = 4,106,390,581.27/42,720.75
6. Step 6: Final answer
   x = 96,121.69