Finding the Third Proportional to 858,643 and 1,864,908

Step by Step Solution

1. Step 1: Write the proportion equation
   858,643 : 1,864,908 = 1,864,908 : x
2. Step 2: Convert to fraction form
   858,643/1,864,908 = 1,864,908/x
3. Step 3: Cross multiply
   858,643x = 1,864,908 × 1,864,908
4. Step 4: Simplify right side
   858,643x = 3,477,881,848,464
5. Step 5: Solve for x
   x = 3,477,881,848,464/858,643
6. Step 6: Final answer
   x = 4,050,439.88