Finding the Third Proportional to 392,757 and 917,860.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,757 : 917,860.50 = 917,860.50 : x
2. Step 2: Convert to fraction form
   392,757/917,860.50 = 917,860.50/x
3. Step 3: Cross multiply
   392,757x = 917,860.50 × 917,860.50
4. Step 4: Simplify right side
   392,757x = 842,467,897,460.25
5. Step 5: Solve for x
   x = 842,467,897,460.25/392,757
6. Step 6: Final answer
   x = 2,145,010.52