Finding the Third Proportional to 900,699 and 1,978,545

Step by Step Solution

1. Step 1: Write the proportion equation
   900,699 : 1,978,545 = 1,978,545 : x
2. Step 2: Convert to fraction form
   900,699/1,978,545 = 1,978,545/x
3. Step 3: Cross multiply
   900,699x = 1,978,545 × 1,978,545
4. Step 4: Simplify right side
   900,699x = 3,914,640,317,025
5. Step 5: Solve for x
   x = 3,914,640,317,025/900,699
6. Step 6: Final answer
   x = 4,346,224.78