Finding the Third Proportional to 861,258 and 1,854,138

Step by Step Solution

1. Step 1: Write the proportion equation
   861,258 : 1,854,138 = 1,854,138 : x
2. Step 2: Convert to fraction form
   861,258/1,854,138 = 1,854,138/x
3. Step 3: Cross multiply
   861,258x = 1,854,138 × 1,854,138
4. Step 4: Simplify right side
   861,258x = 3,437,827,723,044
5. Step 5: Solve for x
   x = 3,437,827,723,044/861,258
6. Step 6: Final answer
   x = 3,991,635.17