Finding the Third Proportional to 2,291,890 and 4,856,978

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291,890 : 4,856,978 = 4,856,978 : x
2. Step 2: Convert to fraction form
   2,291,890/4,856,978 = 4,856,978/x
3. Step 3: Cross multiply
   2,291,890x = 4,856,978 × 4,856,978
4. Step 4: Simplify right side
   2,291,890x = 23,590,235,292,484
5. Step 5: Solve for x
   x = 23,590,235,292,484/2,291,890
6. Step 6: Final answer
   x = 10,292,917.76