Finding the Third Proportional to 685,863 and 1,068,043.50

Step by Step Solution

1. Step 1: Write the proportion equation
   685,863 : 1,068,043.50 = 1,068,043.50 : x
2. Step 2: Convert to fraction form
   685,863/1,068,043.50 = 1,068,043.50/x
3. Step 3: Cross multiply
   685,863x = 1,068,043.50 × 1,068,043.50
4. Step 4: Simplify right side
   685,863x = 1,140,716,917,892.25
5. Step 5: Solve for x
   x = 1,140,716,917,892.25/685,863
6. Step 6: Final answer
   x = 1,663,184.80