Finding the Third Proportional to 249,072 and 349,501.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,072 : 349,501.50 = 349,501.50 : x
2. Step 2: Convert to fraction form
   249,072/349,501.50 = 349,501.50/x
3. Step 3: Cross multiply
   249,072x = 349,501.50 × 349,501.50
4. Step 4: Simplify right side
   249,072x = 122,151,298,502.25
5. Step 5: Solve for x
   x = 122,151,298,502.25/249,072
6. Step 6: Final answer
   x = 490,425.65