Finding the Third Proportional to 42,339.31 and 64,972.97

Step by Step Solution

1. Step 1: Write the proportion equation
   42,339.31 : 64,972.97 = 64,972.97 : x
2. Step 2: Convert to fraction form
   42,339.31/64,972.97 = 64,972.97/x
3. Step 3: Cross multiply
   42,339.31x = 64,972.97 × 64,972.97
4. Step 4: Simplify right side
   42,339.31x = 4,221,486,668.19
5. Step 5: Solve for x
   x = 4,221,486,668.19/42,339.31
6. Step 6: Final answer
   x = 99,706.08