Finding the Third Proportional to 860,128.50 and 1,366,225.50

Step by Step Solution

1. Step 1: Write the proportion equation
   860,128.50 : 1,366,225.50 = 1,366,225.50 : x
2. Step 2: Convert to fraction form
   860,128.50/1,366,225.50 = 1,366,225.50/x
3. Step 3: Cross multiply
   860,128.50x = 1,366,225.50 × 1,366,225.50
4. Step 4: Simplify right side
   860,128.50x = 1,866,572,116,850.25
5. Step 5: Solve for x
   x = 1,866,572,116,850.25/860,128.50
6. Step 6: Final answer
   x = 2,170,108.44