Finding the Third Proportional to 666,715 and 1,059,123

Step by Step Solution

1. Step 1: Write the proportion equation
   666,715 : 1,059,123 = 1,059,123 : x
2. Step 2: Convert to fraction form
   666,715/1,059,123 = 1,059,123/x
3. Step 3: Cross multiply
   666,715x = 1,059,123 × 1,059,123
4. Step 4: Simplify right side
   666,715x = 1,121,741,529,129
5. Step 5: Solve for x
   x = 1,121,741,529,129/666,715
6. Step 6: Final answer
   x = 1,682,490.31