Finding the Third Proportional to 210,159 and 288,994.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,159 : 288,994.50 = 288,994.50 : x
2. Step 2: Convert to fraction form
   210,159/288,994.50 = 288,994.50/x
3. Step 3: Cross multiply
   210,159x = 288,994.50 × 288,994.50
4. Step 4: Simplify right side
   210,159x = 83,517,821,030.25
5. Step 5: Solve for x
   x = 83,517,821,030.25/210,159
6. Step 6: Final answer
   x = 397,403.02