Finding the Third Proportional to 2,166,687.56 and 5,123,977.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,166,687.56 : 5,123,977.31 = 5,123,977.31 : x
2. Step 2: Convert to fraction form
   2,166,687.56/5,123,977.31 = 5,123,977.31/x
3. Step 3: Cross multiply
   2,166,687.56x = 5,123,977.31 × 5,123,977.31
4. Step 4: Simplify right side
   2,166,687.56x = 26,255,143,499,014.72
5. Step 5: Solve for x
   x = 26,255,143,499,014.72/2,166,687.56
6. Step 6: Final answer
   x = 12,117,641.67