Finding the Third Proportional to 19,858 and 29,139

Step by Step Solution

1. Step 1: Write the proportion equation
   19,858 : 29,139 = 29,139 : x
2. Step 2: Convert to fraction form
   19,858/29,139 = 29,139/x
3. Step 3: Cross multiply
   19,858x = 29,139 × 29,139
4. Step 4: Simplify right side
   19,858x = 849,081,321
5. Step 5: Solve for x
   x = 849,081,321/19,858
6. Step 6: Final answer
   x = 42,757.65