Finding the Third Proportional to 748,278 and 1,636,308

Step by Step Solution

1. Step 1: Write the proportion equation
   748,278 : 1,636,308 = 1,636,308 : x
2. Step 2: Convert to fraction form
   748,278/1,636,308 = 1,636,308/x
3. Step 3: Cross multiply
   748,278x = 1,636,308 × 1,636,308
4. Step 4: Simplify right side
   748,278x = 2,677,503,870,864
5. Step 5: Solve for x
   x = 2,677,503,870,864/748,278
6. Step 6: Final answer
   x = 3,578,220.76