Finding the Third Proportional to 5,112,908 and 8,139,589

Step by Step Solution

1. Step 1: Write the proportion equation
   5,112,908 : 8,139,589 = 8,139,589 : x
2. Step 2: Convert to fraction form
   5,112,908/8,139,589 = 8,139,589/x
3. Step 3: Cross multiply
   5,112,908x = 8,139,589 × 8,139,589
4. Step 4: Simplify right side
   5,112,908x = 66,252,909,088,921
5. Step 5: Solve for x
   x = 66,252,909,088,921/5,112,908
6. Step 6: Final answer
   x = 12,957,970.12