Finding the Third Proportional to 249,881.63 and 356,131.69

Step by Step Solution

1. Step 1: Write the proportion equation
   249,881.63 : 356,131.69 = 356,131.69 : x
2. Step 2: Convert to fraction form
   249,881.63/356,131.69 = 356,131.69/x
3. Step 3: Cross multiply
   249,881.63x = 356,131.69 × 356,131.69
4. Step 4: Simplify right side
   249,881.63x = 126,829,778,841.60
5. Step 5: Solve for x
   x = 126,829,778,841.60/249,881.63
6. Step 6: Final answer
   x = 507,559.44