Finding the Third Proportional to 3,555,090 and 7,878,897

Step by Step Solution

1. Step 1: Write the proportion equation
   3,555,090 : 7,878,897 = 7,878,897 : x
2. Step 2: Convert to fraction form
   3,555,090/7,878,897 = 7,878,897/x
3. Step 3: Cross multiply
   3,555,090x = 7,878,897 × 7,878,897
4. Step 4: Simplify right side
   3,555,090x = 62,077,017,936,609
5. Step 5: Solve for x
   x = 62,077,017,936,609/3,555,090
6. Step 6: Final answer
   x = 17,461,447.65