Finding the Third Proportional to 820,528 and 1,772,280

Step by Step Solution

1. Step 1: Write the proportion equation
   820,528 : 1,772,280 = 1,772,280 : x
2. Step 2: Convert to fraction form
   820,528/1,772,280 = 1,772,280/x
3. Step 3: Cross multiply
   820,528x = 1,772,280 × 1,772,280
4. Step 4: Simplify right side
   820,528x = 3,140,976,398,400
5. Step 5: Solve for x
   x = 3,140,976,398,400/820,528
6. Step 6: Final answer
   x = 3,827,994.17