Finding the Third Proportional to 399,444 and 828,373.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,444 : 828,373.50 = 828,373.50 : x
2. Step 2: Convert to fraction form
   399,444/828,373.50 = 828,373.50/x
3. Step 3: Cross multiply
   399,444x = 828,373.50 × 828,373.50
4. Step 4: Simplify right side
   399,444x = 686,202,655,502.25
5. Step 5: Solve for x
   x = 686,202,655,502.25/399,444
6. Step 6: Final answer
   x = 1,717,894.51