Finding the Third Proportional to 143,313 and 309,970.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,313 : 309,970.50 = 309,970.50 : x
2. Step 2: Convert to fraction form
   143,313/309,970.50 = 309,970.50/x
3. Step 3: Cross multiply
   143,313x = 309,970.50 × 309,970.50
4. Step 4: Simplify right side
   143,313x = 96,081,710,870.25
5. Step 5: Solve for x
   x = 96,081,710,870.25/143,313
6. Step 6: Final answer
   x = 670,432.63