Finding the Third Proportional to 249,556.50 and 387,870.75

Step by Step Solution

1. Step 1: Write the proportion equation
   249,556.50 : 387,870.75 = 387,870.75 : x
2. Step 2: Convert to fraction form
   249,556.50/387,870.75 = 387,870.75/x
3. Step 3: Cross multiply
   249,556.50x = 387,870.75 × 387,870.75
4. Step 4: Simplify right side
   249,556.50x = 150,443,718,705.56
5. Step 5: Solve for x
   x = 150,443,718,705.56/249,556.50
6. Step 6: Final answer
   x = 602,844.32