Finding the Third Proportional to 388,410.50 and 830,791

Step by Step Solution

1. Step 1: Write the proportion equation
   388,410.50 : 830,791 = 830,791 : x
2. Step 2: Convert to fraction form
   388,410.50/830,791 = 830,791/x
3. Step 3: Cross multiply
   388,410.50x = 830,791 × 830,791
4. Step 4: Simplify right side
   388,410.50x = 690,213,685,681
5. Step 5: Solve for x
   x = 690,213,685,681/388,410.50
6. Step 6: Final answer
   x = 1,777,021.18