Finding the Third Proportional to 699,128.72 and 1,079,600.91

Step by Step Solution

1. Step 1: Write the proportion equation
   699,128.72 : 1,079,600.91 = 1,079,600.91 : x
2. Step 2: Convert to fraction form
   699,128.72/1,079,600.91 = 1,079,600.91/x
3. Step 3: Cross multiply
   699,128.72x = 1,079,600.91 × 1,079,600.91
4. Step 4: Simplify right side
   699,128.72x = 1,165,538,116,775.82
5. Step 5: Solve for x
   x = 1,165,538,116,775.82/699,128.72
6. Step 6: Final answer
   x = 1,667,129.51