Finding the Third Proportional to 61,160.06 and 86,128.31

Step by Step Solution

1. Step 1: Write the proportion equation
   61,160.06 : 86,128.31 = 86,128.31 : x
2. Step 2: Convert to fraction form
   61,160.06/86,128.31 = 86,128.31/x
3. Step 3: Cross multiply
   61,160.06x = 86,128.31 × 86,128.31
4. Step 4: Simplify right side
   61,160.06x = 7,418,086,214.10
5. Step 5: Solve for x
   x = 7,418,086,214.10/61,160.06
6. Step 6: Final answer
   x = 121,289.71