Finding the Third Proportional to 69,129 and 141,173.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,129 : 141,173.50 = 141,173.50 : x
2. Step 2: Convert to fraction form
   69,129/141,173.50 = 141,173.50/x
3. Step 3: Cross multiply
   69,129x = 141,173.50 × 141,173.50
4. Step 4: Simplify right side
   69,129x = 19,929,957,102.25
5. Step 5: Solve for x
   x = 19,929,957,102.25/69,129
6. Step 6: Final answer
   x = 288,300.96