Finding the Third Proportional to 245,430 and 286,861.50

Step by Step Solution

1. Step 1: Write the proportion equation
   245,430 : 286,861.50 = 286,861.50 : x
2. Step 2: Convert to fraction form
   245,430/286,861.50 = 286,861.50/x
3. Step 3: Cross multiply
   245,430x = 286,861.50 × 286,861.50
4. Step 4: Simplify right side
   245,430x = 82,289,520,182.25
5. Step 5: Solve for x
   x = 82,289,520,182.25/245,430
6. Step 6: Final answer
   x = 335,287.13