Finding the Third Proportional to 906,921 and 1,977,138

Step by Step Solution

1. Step 1: Write the proportion equation
   906,921 : 1,977,138 = 1,977,138 : x
2. Step 2: Convert to fraction form
   906,921/1,977,138 = 1,977,138/x
3. Step 3: Cross multiply
   906,921x = 1,977,138 × 1,977,138
4. Step 4: Simplify right side
   906,921x = 3,909,074,671,044
5. Step 5: Solve for x
   x = 3,909,074,671,044/906,921
6. Step 6: Final answer
   x = 4,310,270.32