Finding the Third Proportional to 90,610 and 139,955

Step by Step Solution

1. Step 1: Write the proportion equation
   90,610 : 139,955 = 139,955 : x
2. Step 2: Convert to fraction form
   90,610/139,955 = 139,955/x
3. Step 3: Cross multiply
   90,610x = 139,955 × 139,955
4. Step 4: Simplify right side
   90,610x = 19,587,402,025
5. Step 5: Solve for x
   x = 19,587,402,025/90,610
6. Step 6: Final answer
   x = 216,172.63