Finding the Third Proportional to 767,128 and 1,615,148

Step by Step Solution

1. Step 1: Write the proportion equation
   767,128 : 1,615,148 = 1,615,148 : x
2. Step 2: Convert to fraction form
   767,128/1,615,148 = 1,615,148/x
3. Step 3: Cross multiply
   767,128x = 1,615,148 × 1,615,148
4. Step 4: Simplify right side
   767,128x = 2,608,703,061,904
5. Step 5: Solve for x
   x = 2,608,703,061,904/767,128
6. Step 6: Final answer
   x = 3,400,609.89