Finding the Third Proportional to 86,739 and 134,047.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,739 : 134,047.50 = 134,047.50 : x
2. Step 2: Convert to fraction form
   86,739/134,047.50 = 134,047.50/x
3. Step 3: Cross multiply
   86,739x = 134,047.50 × 134,047.50
4. Step 4: Simplify right side
   86,739x = 17,968,732,256.25
5. Step 5: Solve for x
   x = 17,968,732,256.25/86,739
6. Step 6: Final answer
   x = 207,158.63