Finding the Third Proportional to 249,438 and 380,383.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,438 : 380,383.50 = 380,383.50 : x
2. Step 2: Convert to fraction form
   249,438/380,383.50 = 380,383.50/x
3. Step 3: Cross multiply
   249,438x = 380,383.50 × 380,383.50
4. Step 4: Simplify right side
   249,438x = 144,691,607,072.25
5. Step 5: Solve for x
   x = 144,691,607,072.25/249,438
6. Step 6: Final answer
   x = 580,070.43