Finding the Third Proportional to 156,379.38 and 258,832

Step by Step Solution

1. Step 1: Write the proportion equation
   156,379.38 : 258,832 = 258,832 : x
2. Step 2: Convert to fraction form
   156,379.38/258,832 = 258,832/x
3. Step 3: Cross multiply
   156,379.38x = 258,832 × 258,832
4. Step 4: Simplify right side
   156,379.38x = 66,994,004,224
5. Step 5: Solve for x
   x = 66,994,004,224/156,379.38
6. Step 6: Final answer
   x = 428,406.91