Finding the Third Proportional to 315,522 and 692,280

Step by Step Solution

1. Step 1: Write the proportion equation
   315,522 : 692,280 = 692,280 : x
2. Step 2: Convert to fraction form
   315,522/692,280 = 692,280/x
3. Step 3: Cross multiply
   315,522x = 692,280 × 692,280
4. Step 4: Simplify right side
   315,522x = 479,251,598,400
5. Step 5: Solve for x
   x = 479,251,598,400/315,522
6. Step 6: Final answer
   x = 1,518,916.58