Finding the Third Proportional to 64,690.25 and 141,449.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,690.25 : 141,449.50 = 141,449.50 : x
2. Step 2: Convert to fraction form
   64,690.25/141,449.50 = 141,449.50/x
3. Step 3: Cross multiply
   64,690.25x = 141,449.50 × 141,449.50
4. Step 4: Simplify right side
   64,690.25x = 20,007,961,050.25
5. Step 5: Solve for x
   x = 20,007,961,050.25/64,690.25
6. Step 6: Final answer
   x = 309,288.66