Finding the Third Proportional to 39,431.81 and 53,133.47

Step by Step Solution

1. Step 1: Write the proportion equation
   39,431.81 : 53,133.47 = 53,133.47 : x
2. Step 2: Convert to fraction form
   39,431.81/53,133.47 = 53,133.47/x
3. Step 3: Cross multiply
   39,431.81x = 53,133.47 × 53,133.47
4. Step 4: Simplify right side
   39,431.81x = 2,823,165,501.41
5. Step 5: Solve for x
   x = 2,823,165,501.41/39,431.81
6. Step 6: Final answer
   x = 71,596.14