Finding the Third Proportional to 409,302.56 and 861,019.88

Step by Step Solution

1. Step 1: Write the proportion equation
   409,302.56 : 861,019.88 = 861,019.88 : x
2. Step 2: Convert to fraction form
   409,302.56/861,019.88 = 861,019.88/x
3. Step 3: Cross multiply
   409,302.56x = 861,019.88 × 861,019.88
4. Step 4: Simplify right side
   409,302.56x = 741,355,225,145.02
5. Step 5: Solve for x
   x = 741,355,225,145.02/409,302.56
6. Step 6: Final answer
   x = 1,811,264.56