Finding the Third Proportional to 355,131 and 499,513.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,131 : 499,513.50 = 499,513.50 : x
2. Step 2: Convert to fraction form
   355,131/499,513.50 = 499,513.50/x
3. Step 3: Cross multiply
   355,131x = 499,513.50 × 499,513.50
4. Step 4: Simplify right side
   355,131x = 249,513,736,682.25
5. Step 5: Solve for x
   x = 249,513,736,682.25/355,131
6. Step 6: Final answer
   x = 702,596.33