Finding the Third Proportional to 559,879 and 850,186.50

Step by Step Solution

1. Step 1: Write the proportion equation
   559,879 : 850,186.50 = 850,186.50 : x
2. Step 2: Convert to fraction form
   559,879/850,186.50 = 850,186.50/x
3. Step 3: Cross multiply
   559,879x = 850,186.50 × 850,186.50
4. Step 4: Simplify right side
   559,879x = 722,817,084,782.25
5. Step 5: Solve for x
   x = 722,817,084,782.25/559,879
6. Step 6: Final answer
   x = 1,291,023.75