Finding the Third Proportional to 2,345,128 and 5,139,156

Step by Step Solution

1. Step 1: Write the proportion equation
   2,345,128 : 5,139,156 = 5,139,156 : x
2. Step 2: Convert to fraction form
   2,345,128/5,139,156 = 5,139,156/x
3. Step 3: Cross multiply
   2,345,128x = 5,139,156 × 5,139,156
4. Step 4: Simplify right side
   2,345,128x = 26,410,924,392,336
5. Step 5: Solve for x
   x = 26,410,924,392,336/2,345,128
6. Step 6: Final answer
   x = 11,262,039.60