Finding the Third Proportional to 1,209,680.50 and 1,856,503.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,680.50 : 1,856,503.50 = 1,856,503.50 : x
2. Step 2: Convert to fraction form
   1,209,680.50/1,856,503.50 = 1,856,503.50/x
3. Step 3: Cross multiply
   1,209,680.50x = 1,856,503.50 × 1,856,503.50
4. Step 4: Simplify right side
   1,209,680.50x = 3,446,605,245,512.25
5. Step 5: Solve for x
   x = 3,446,605,245,512.25/1,209,680.50
6. Step 6: Final answer
   x = 2,849,186.41