Finding the Third Proportional to 386,491.50 and 830,124

Step by Step Solution

1. Step 1: Write the proportion equation
   386,491.50 : 830,124 = 830,124 : x
2. Step 2: Convert to fraction form
   386,491.50/830,124 = 830,124/x
3. Step 3: Cross multiply
   386,491.50x = 830,124 × 830,124
4. Step 4: Simplify right side
   386,491.50x = 689,105,855,376
5. Step 5: Solve for x
   x = 689,105,855,376/386,491.50
6. Step 6: Final answer
   x = 1,782,978.04