Finding the Third Proportional to 559,899 and 850,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   559,899 : 850,216.50 = 850,216.50 : x
2. Step 2: Convert to fraction form
   559,899/850,216.50 = 850,216.50/x
3. Step 3: Cross multiply
   559,899x = 850,216.50 × 850,216.50
4. Step 4: Simplify right side
   559,899x = 722,868,096,872.25
5. Step 5: Solve for x
   x = 722,868,096,872.25/559,899
6. Step 6: Final answer
   x = 1,291,068.74