Finding the Third Proportional to 87,115.50 and 134,640

Step by Step Solution

1. Step 1: Write the proportion equation
   87,115.50 : 134,640 = 134,640 : x
2. Step 2: Convert to fraction form
   87,115.50/134,640 = 134,640/x
3. Step 3: Cross multiply
   87,115.50x = 134,640 × 134,640
4. Step 4: Simplify right side
   87,115.50x = 18,127,929,600
5. Step 5: Solve for x
   x = 18,127,929,600/87,115.50
6. Step 6: Final answer
   x = 208,090.75