Finding the Third Proportional to 67,058 and 139,572

Step by Step Solution

1. Step 1: Write the proportion equation
   67,058 : 139,572 = 139,572 : x
2. Step 2: Convert to fraction form
   67,058/139,572 = 139,572/x
3. Step 3: Cross multiply
   67,058x = 139,572 × 139,572
4. Step 4: Simplify right side
   67,058x = 19,480,343,184
5. Step 5: Solve for x
   x = 19,480,343,184/67,058
6. Step 6: Final answer
   x = 290,499.91