Finding the Third Proportional to 525,528 and 815,280

Step by Step Solution

1. Step 1: Write the proportion equation
   525,528 : 815,280 = 815,280 : x
2. Step 2: Convert to fraction form
   525,528/815,280 = 815,280/x
3. Step 3: Cross multiply
   525,528x = 815,280 × 815,280
4. Step 4: Simplify right side
   525,528x = 664,681,478,400
5. Step 5: Solve for x
   x = 664,681,478,400/525,528
6. Step 6: Final answer
   x = 1,264,787.94