Finding the Third Proportional to 127,129 and 172,655.50

Step by Step Solution

1. Step 1: Write the proportion equation
   127,129 : 172,655.50 = 172,655.50 : x
2. Step 2: Convert to fraction form
   127,129/172,655.50 = 172,655.50/x
3. Step 3: Cross multiply
   127,129x = 172,655.50 × 172,655.50
4. Step 4: Simplify right side
   127,129x = 29,809,921,680.25
5. Step 5: Solve for x
   x = 29,809,921,680.25/127,129
6. Step 6: Final answer
   x = 234,485.61