Finding the Third Proportional to 2,543,657 and 5,390,578

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543,657 : 5,390,578 = 5,390,578 : x
2. Step 2: Convert to fraction form
   2,543,657/5,390,578 = 5,390,578/x
3. Step 3: Cross multiply
   2,543,657x = 5,390,578 × 5,390,578
4. Step 4: Simplify right side
   2,543,657x = 29,058,331,174,084
5. Step 5: Solve for x
   x = 29,058,331,174,084/2,543,657
6. Step 6: Final answer
   x = 11,423,840.23