Finding the Third Proportional to 580,909 and 1,258,316

Step by Step Solution

1. Step 1: Write the proportion equation
   580,909 : 1,258,316 = 1,258,316 : x
2. Step 2: Convert to fraction form
   580,909/1,258,316 = 1,258,316/x
3. Step 3: Cross multiply
   580,909x = 1,258,316 × 1,258,316
4. Step 4: Simplify right side
   580,909x = 1,583,359,155,856
5. Step 5: Solve for x
   x = 1,583,359,155,856/580,909
6. Step 6: Final answer
   x = 2,725,657.82