Finding the Third Proportional to 66,326 and 139,060

Step by Step Solution

1. Step 1: Write the proportion equation
   66,326 : 139,060 = 139,060 : x
2. Step 2: Convert to fraction form
   66,326/139,060 = 139,060/x
3. Step 3: Cross multiply
   66,326x = 139,060 × 139,060
4. Step 4: Simplify right side
   66,326x = 19,337,683,600
5. Step 5: Solve for x
   x = 19,337,683,600/66,326
6. Step 6: Final answer
   x = 291,555.10