Finding the Third Proportional to 60,407 and 142,139

Step by Step Solution

1. Step 1: Write the proportion equation
   60,407 : 142,139 = 142,139 : x
2. Step 2: Convert to fraction form
   60,407/142,139 = 142,139/x
3. Step 3: Cross multiply
   60,407x = 142,139 × 142,139
4. Step 4: Simplify right side
   60,407x = 20,203,495,321
5. Step 5: Solve for x
   x = 20,203,495,321/60,407
6. Step 6: Final answer
   x = 334,456.19