Finding the Third Proportional to 7,873,276 and 12,856,254

Step by Step Solution

1. Step 1: Write the proportion equation
   7,873,276 : 12,856,254 = 12,856,254 : x
2. Step 2: Convert to fraction form
   7,873,276/12,856,254 = 12,856,254/x
3. Step 3: Cross multiply
   7,873,276x = 12,856,254 × 12,856,254
4. Step 4: Simplify right side
   7,873,276x = 165,283,266,912,516
5. Step 5: Solve for x
   x = 165,283,266,912,516/7,873,276
6. Step 6: Final answer
   x = 20,992,947.14