Finding the Third Proportional to 43,159 and 58,311

Step by Step Solution

1. Step 1: Write the proportion equation
   43,159 : 58,311 = 58,311 : x
2. Step 2: Convert to fraction form
   43,159/58,311 = 58,311/x
3. Step 3: Cross multiply
   43,159x = 58,311 × 58,311
4. Step 4: Simplify right side
   43,159x = 3,400,172,721
5. Step 5: Solve for x
   x = 3,400,172,721/43,159
6. Step 6: Final answer
   x = 78,782.47