Finding the Third Proportional to 89,160.19 and 138,501.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,160.19 : 138,501.31 = 138,501.31 : x
2. Step 2: Convert to fraction form
   89,160.19/138,501.31 = 138,501.31/x
3. Step 3: Cross multiply
   89,160.19x = 138,501.31 × 138,501.31
4. Step 4: Simplify right side
   89,160.19x = 19,182,613,564.22
5. Step 5: Solve for x
   x = 19,182,613,564.22/89,160.19
6. Step 6: Final answer
   x = 215,147.75