Finding the Third Proportional to 619,302 and 872,090

Step by Step Solution

1. Step 1: Write the proportion equation
   619,302 : 872,090 = 872,090 : x
2. Step 2: Convert to fraction form
   619,302/872,090 = 872,090/x
3. Step 3: Cross multiply
   619,302x = 872,090 × 872,090
4. Step 4: Simplify right side
   619,302x = 760,540,968,100
5. Step 5: Solve for x
   x = 760,540,968,100/619,302
6. Step 6: Final answer
   x = 1,228,061.54