Finding the Third Proportional to 689,572.13 and 1,070,443.69

Step by Step Solution

1. Step 1: Write the proportion equation
   689,572.13 : 1,070,443.69 = 1,070,443.69 : x
2. Step 2: Convert to fraction form
   689,572.13/1,070,443.69 = 1,070,443.69/x
3. Step 3: Cross multiply
   689,572.13x = 1,070,443.69 × 1,070,443.69
4. Step 4: Simplify right side
   689,572.13x = 1,145,849,688,108.60
5. Step 5: Solve for x
   x = 1,145,849,688,108.60/689,572.13
6. Step 6: Final answer
   x = 1,661,682.15