Finding the Third Proportional to 890,690 and 1,868,908

Step by Step Solution

1. Step 1: Write the proportion equation
   890,690 : 1,868,908 = 1,868,908 : x
2. Step 2: Convert to fraction form
   890,690/1,868,908 = 1,868,908/x
3. Step 3: Cross multiply
   890,690x = 1,868,908 × 1,868,908
4. Step 4: Simplify right side
   890,690x = 3,492,817,112,464
5. Step 5: Solve for x
   x = 3,492,817,112,464/890,690
6. Step 6: Final answer
   x = 3,921,473.37