Finding the Third Proportional to 196,807.50 and 431,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   196,807.50 : 431,443.50 = 431,443.50 : x
2. Step 2: Convert to fraction form
   196,807.50/431,443.50 = 431,443.50/x
3. Step 3: Cross multiply
   196,807.50x = 431,443.50 × 431,443.50
4. Step 4: Simplify right side
   196,807.50x = 186,143,493,692.25
5. Step 5: Solve for x
   x = 186,143,493,692.25/196,807.50
6. Step 6: Final answer
   x = 945,815.04