Finding the Third Proportional to 788,806 and 1,287,915

Step by Step Solution

1. Step 1: Write the proportion equation
   788,806 : 1,287,915 = 1,287,915 : x
2. Step 2: Convert to fraction form
   788,806/1,287,915 = 1,287,915/x
3. Step 3: Cross multiply
   788,806x = 1,287,915 × 1,287,915
4. Step 4: Simplify right side
   788,806x = 1,658,725,047,225
5. Step 5: Solve for x
   x = 1,658,725,047,225/788,806
6. Step 6: Final answer
   x = 2,102,830.16