Finding the Third Proportional to 69,720 and 143,146.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,720 : 143,146.50 = 143,146.50 : x
2. Step 2: Convert to fraction form
   69,720/143,146.50 = 143,146.50/x
3. Step 3: Cross multiply
   69,720x = 143,146.50 × 143,146.50
4. Step 4: Simplify right side
   69,720x = 20,490,920,462.25
5. Step 5: Solve for x
   x = 20,490,920,462.25/69,720
6. Step 6: Final answer
   x = 293,903.05