Finding the Third Proportional to 281,378 and 616,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   281,378 : 616,120.50 = 616,120.50 : x
2. Step 2: Convert to fraction form
   281,378/616,120.50 = 616,120.50/x
3. Step 3: Cross multiply
   281,378x = 616,120.50 × 616,120.50
4. Step 4: Simplify right side
   281,378x = 379,604,470,520.25
5. Step 5: Solve for x
   x = 379,604,470,520.25/281,378
6. Step 6: Final answer
   x = 1,349,090.80