Finding the Third Proportional to 67,980.38 and 145,802.25

Step by Step Solution

1. Step 1: Write the proportion equation
   67,980.38 : 145,802.25 = 145,802.25 : x
2. Step 2: Convert to fraction form
   67,980.38/145,802.25 = 145,802.25/x
3. Step 3: Cross multiply
   67,980.38x = 145,802.25 × 145,802.25
4. Step 4: Simplify right side
   67,980.38x = 21,258,296,105.06
5. Step 5: Solve for x
   x = 21,258,296,105.06/67,980.38
6. Step 6: Final answer
   x = 312,712.25