Finding the Third Proportional to 409,029 and 878,776.50

Step by Step Solution

1. Step 1: Write the proportion equation
   409,029 : 878,776.50 = 878,776.50 : x
2. Step 2: Convert to fraction form
   409,029/878,776.50 = 878,776.50/x
3. Step 3: Cross multiply
   409,029x = 878,776.50 × 878,776.50
4. Step 4: Simplify right side
   409,029x = 772,248,136,952.25
5. Step 5: Solve for x
   x = 772,248,136,952.25/409,029
6. Step 6: Final answer
   x = 1,888,003.39