Finding the Third Proportional to 249,795 and 380,911.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,795 : 380,911.50 = 380,911.50 : x
2. Step 2: Convert to fraction form
   249,795/380,911.50 = 380,911.50/x
3. Step 3: Cross multiply
   249,795x = 380,911.50 × 380,911.50
4. Step 4: Simplify right side
   249,795x = 145,093,570,832.25
5. Step 5: Solve for x
   x = 145,093,570,832.25/249,795
6. Step 6: Final answer
   x = 580,850.58