Finding the Third Proportional to 385,749 and 828,900

Step by Step Solution

1. Step 1: Write the proportion equation
   385,749 : 828,900 = 828,900 : x
2. Step 2: Convert to fraction form
   385,749/828,900 = 828,900/x
3. Step 3: Cross multiply
   385,749x = 828,900 × 828,900
4. Step 4: Simplify right side
   385,749x = 687,075,210,000
5. Step 5: Solve for x
   x = 687,075,210,000/385,749
6. Step 6: Final answer
   x = 1,781,145.80