Finding the Third Proportional to 1,915,221 and 4,112,688

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915,221 : 4,112,688 = 4,112,688 : x
2. Step 2: Convert to fraction form
   1,915,221/4,112,688 = 4,112,688/x
3. Step 3: Cross multiply
   1,915,221x = 4,112,688 × 4,112,688
4. Step 4: Simplify right side
   1,915,221x = 16,914,202,585,344
5. Step 5: Solve for x
   x = 16,914,202,585,344/1,915,221
6. Step 6: Final answer
   x = 8,831,462.58