Finding the Third Proportional to 699,159 and 1,079,647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   699,159 : 1,079,647.50 = 1,079,647.50 : x
2. Step 2: Convert to fraction form
   699,159/1,079,647.50 = 1,079,647.50/x
3. Step 3: Cross multiply
   699,159x = 1,079,647.50 × 1,079,647.50
4. Step 4: Simplify right side
   699,159x = 1,165,638,724,256.25
5. Step 5: Solve for x
   x = 1,165,638,724,256.25/699,159
6. Step 6: Final answer
   x = 1,667,201.20