Finding the Third Proportional to 688,080 and 1,042,488

Step by Step Solution

1. Step 1: Write the proportion equation
   688,080 : 1,042,488 = 1,042,488 : x
2. Step 2: Convert to fraction form
   688,080/1,042,488 = 1,042,488/x
3. Step 3: Cross multiply
   688,080x = 1,042,488 × 1,042,488
4. Step 4: Simplify right side
   688,080x = 1,086,781,230,144
5. Step 5: Solve for x
   x = 1,086,781,230,144/688,080
6. Step 6: Final answer
   x = 1,579,440.23