Finding the Third Proportional to 666,316 and 1,059,726

Step by Step Solution

1. Step 1: Write the proportion equation
   666,316 : 1,059,726 = 1,059,726 : x
2. Step 2: Convert to fraction form
   666,316/1,059,726 = 1,059,726/x
3. Step 3: Cross multiply
   666,316x = 1,059,726 × 1,059,726
4. Step 4: Simplify right side
   666,316x = 1,123,019,195,076
5. Step 5: Solve for x
   x = 1,123,019,195,076/666,316
6. Step 6: Final answer
   x = 1,685,415.32