Finding the Third Proportional to 196,988.63 and 300,405.38

Step by Step Solution

1. Step 1: Write the proportion equation
   196,988.63 : 300,405.38 = 300,405.38 : x
2. Step 2: Convert to fraction form
   196,988.63/300,405.38 = 300,405.38/x
3. Step 3: Cross multiply
   196,988.63x = 300,405.38 × 300,405.38
4. Step 4: Simplify right side
   196,988.63x = 90,243,389,328.89
5. Step 5: Solve for x
   x = 90,243,389,328.89/196,988.63
6. Step 6: Final answer
   x = 458,114.72