Finding the Third Proportional to 143,451 and 210,802.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,451 : 210,802.50 = 210,802.50 : x
2. Step 2: Convert to fraction form
   143,451/210,802.50 = 210,802.50/x
3. Step 3: Cross multiply
   143,451x = 210,802.50 × 210,802.50
4. Step 4: Simplify right side
   143,451x = 44,437,694,006.25
5. Step 5: Solve for x
   x = 44,437,694,006.25/143,451
6. Step 6: Final answer
   x = 309,776.12