Finding the Third Proportional to 66,636 and 143,941.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,636 : 143,941.50 = 143,941.50 : x
2. Step 2: Convert to fraction form
   66,636/143,941.50 = 143,941.50/x
3. Step 3: Cross multiply
   66,636x = 143,941.50 × 143,941.50
4. Step 4: Simplify right side
   66,636x = 20,719,155,422.25
5. Step 5: Solve for x
   x = 20,719,155,422.25/66,636
6. Step 6: Final answer
   x = 310,930.36