Finding the Third Proportional to 688,290 and 1,509,528

Step by Step Solution

1. Step 1: Write the proportion equation
   688,290 : 1,509,528 = 1,509,528 : x
2. Step 2: Convert to fraction form
   688,290/1,509,528 = 1,509,528/x
3. Step 3: Cross multiply
   688,290x = 1,509,528 × 1,509,528
4. Step 4: Simplify right side
   688,290x = 2,278,674,782,784
5. Step 5: Solve for x
   x = 2,278,674,782,784/688,290
6. Step 6: Final answer
   x = 3,310,631.83