Finding the Third Proportional to 72,146 and 158,129

Step by Step Solution

1. Step 1: Write the proportion equation
   72,146 : 158,129 = 158,129 : x
2. Step 2: Convert to fraction form
   72,146/158,129 = 158,129/x
3. Step 3: Cross multiply
   72,146x = 158,129 × 158,129
4. Step 4: Simplify right side
   72,146x = 25,004,780,641
5. Step 5: Solve for x
   x = 25,004,780,641/72,146
6. Step 6: Final answer
   x = 346,585.82