Finding the Third Proportional to 249,429.75 and 380,371.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,429.75 : 380,371.50 = 380,371.50 : x
2. Step 2: Convert to fraction form
   249,429.75/380,371.50 = 380,371.50/x
3. Step 3: Cross multiply
   249,429.75x = 380,371.50 × 380,371.50
4. Step 4: Simplify right side
   249,429.75x = 144,682,478,012.25
5. Step 5: Solve for x
   x = 144,682,478,012.25/249,429.75
6. Step 6: Final answer
   x = 580,053.01