Finding the Third Proportional to 54,264.94 and 86,644.69

Step by Step Solution

1. Step 1: Write the proportion equation
   54,264.94 : 86,644.69 = 86,644.69 : x
2. Step 2: Convert to fraction form
   54,264.94/86,644.69 = 86,644.69/x
3. Step 3: Cross multiply
   54,264.94x = 86,644.69 × 86,644.69
4. Step 4: Simplify right side
   54,264.94x = 7,507,301,871.97
5. Step 5: Solve for x
   x = 7,507,301,871.97/54,264.94
6. Step 6: Final answer
   x = 138,345.35