Finding the Third Proportional to 66,462 and 143,359.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,462 : 143,359.50 = 143,359.50 : x
2. Step 2: Convert to fraction form
   66,462/143,359.50 = 143,359.50/x
3. Step 3: Cross multiply
   66,462x = 143,359.50 × 143,359.50
4. Step 4: Simplify right side
   66,462x = 20,551,946,240.25
5. Step 5: Solve for x
   x = 20,551,946,240.25/66,462
6. Step 6: Final answer
   x = 309,228.53