Finding the Third Proportional to 143,869.50 and 307,543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,869.50 : 307,543.50 = 307,543.50 : x
2. Step 2: Convert to fraction form
   143,869.50/307,543.50 = 307,543.50/x
3. Step 3: Cross multiply
   143,869.50x = 307,543.50 × 307,543.50
4. Step 4: Simplify right side
   143,869.50x = 94,583,004,392.25
5. Step 5: Solve for x
   x = 94,583,004,392.25/143,869.50
6. Step 6: Final answer
   x = 657,422.21