Finding the Third Proportional to 53,888.67 and 81,578.53

Step by Step Solution

1. Step 1: Write the proportion equation
   53,888.67 : 81,578.53 = 81,578.53 : x
2. Step 2: Convert to fraction form
   53,888.67/81,578.53 = 81,578.53/x
3. Step 3: Cross multiply
   53,888.67x = 81,578.53 × 81,578.53
4. Step 4: Simplify right side
   53,888.67x = 6,655,056,760.91
5. Step 5: Solve for x
   x = 6,655,056,760.91/53,888.67
6. Step 6: Final answer
   x = 123,496.40