Finding the Fourth Proportional to 12,486,610.34, 17,234,401.83 and 8,128,105.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,486,610.34 : 17,234,401.83 = 8,128,105.10 : x
2. Step 2: Convert to fraction form
   12,486,610.34/17,234,401.83 = 8,128,105.10/x
3. Step 3: Cross multiply
   12,486,610.34x = 17,234,401.83 × 8,128,105.10
4. Step 4: Simplify right side
   12,486,610.34x = 140,083,029,409,872.31
5. Step 5: Solve for x
   x = 140,083,029,409,872.31/12,486,610.34
6. Step 6: Final answer
   x = 11,218,659.48