Finding the Third Proportional to 67,191 and 139,908

Step by Step Solution

1. Step 1: Write the proportion equation
   67,191 : 139,908 = 139,908 : x
2. Step 2: Convert to fraction form
   67,191/139,908 = 139,908/x
3. Step 3: Cross multiply
   67,191x = 139,908 × 139,908
4. Step 4: Simplify right side
   67,191x = 19,574,248,464
5. Step 5: Solve for x
   x = 19,574,248,464/67,191
6. Step 6: Final answer
   x = 291,322.48