Finding the Third Proportional to 661,581 and 931,669.59

Step by Step Solution

1. Step 1: Write the proportion equation
   661,581 : 931,669.59 = 931,669.59 : x
2. Step 2: Convert to fraction form
   661,581/931,669.59 = 931,669.59/x
3. Step 3: Cross multiply
   661,581x = 931,669.59 × 931,669.59
4. Step 4: Simplify right side
   661,581x = 868,008,231,918.29
5. Step 5: Solve for x
   x = 868,008,231,918.29/661,581
6. Step 6: Final answer
   x = 1,312,021.10