Finding the Third Proportional to 2,578,188 and 5,615,160

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578,188 : 5,615,160 = 5,615,160 : x
2. Step 2: Convert to fraction form
   2,578,188/5,615,160 = 5,615,160/x
3. Step 3: Cross multiply
   2,578,188x = 5,615,160 × 5,615,160
4. Step 4: Simplify right side
   2,578,188x = 31,530,021,825,600
5. Step 5: Solve for x
   x = 31,530,021,825,600/2,578,188
6. Step 6: Final answer
   x = 12,229,527.80