Finding the Third Proportional to 818,390 and 1,929,172

Step by Step Solution

1. Step 1: Write the proportion equation
   818,390 : 1,929,172 = 1,929,172 : x
2. Step 2: Convert to fraction form
   818,390/1,929,172 = 1,929,172/x
3. Step 3: Cross multiply
   818,390x = 1,929,172 × 1,929,172
4. Step 4: Simplify right side
   818,390x = 3,721,704,605,584
5. Step 5: Solve for x
   x = 3,721,704,605,584/818,390
6. Step 6: Final answer
   x = 4,547,592.96