Finding the Third Proportional to 249,789 and 380,940.75

Step by Step Solution

1. Step 1: Write the proportion equation
   249,789 : 380,940.75 = 380,940.75 : x
2. Step 2: Convert to fraction form
   249,789/380,940.75 = 380,940.75/x
3. Step 3: Cross multiply
   249,789x = 380,940.75 × 380,940.75
4. Step 4: Simplify right side
   249,789x = 145,115,855,010.56
5. Step 5: Solve for x
   x = 145,115,855,010.56/249,789
6. Step 6: Final answer
   x = 580,953.75