Finding the Third Proportional to 87,129 and 134,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,129 : 134,077.50 = 134,077.50 : x
2. Step 2: Convert to fraction form
   87,129/134,077.50 = 134,077.50/x
3. Step 3: Cross multiply
   87,129x = 134,077.50 × 134,077.50
4. Step 4: Simplify right side
   87,129x = 17,976,776,006.25
5. Step 5: Solve for x
   x = 17,976,776,006.25/87,129
6. Step 6: Final answer
   x = 206,323.68