Finding the Third Proportional to 666,699 and 1,059,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   666,699 : 1,059,100.50 = 1,059,100.50 : x
2. Step 2: Convert to fraction form
   666,699/1,059,100.50 = 1,059,100.50/x
3. Step 3: Cross multiply
   666,699x = 1,059,100.50 × 1,059,100.50
4. Step 4: Simplify right side
   666,699x = 1,121,693,869,100.25
5. Step 5: Solve for x
   x = 1,121,693,869,100.25/666,699
6. Step 6: Final answer
   x = 1,682,459.20