Finding the Third Proportional to 688,284 and 1,509,516

Step by Step Solution

1. Step 1: Write the proportion equation
   688,284 : 1,509,516 = 1,509,516 : x
2. Step 2: Convert to fraction form
   688,284/1,509,516 = 1,509,516/x
3. Step 3: Cross multiply
   688,284x = 1,509,516 × 1,509,516
4. Step 4: Simplify right side
   688,284x = 2,278,638,554,256
5. Step 5: Solve for x
   x = 2,278,638,554,256/688,284
6. Step 6: Final answer
   x = 3,310,608.05