Finding the Third Proportional to 2,605.61 and 5,430.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,605.61 : 5,430.48 = 5,430.48 : x
2. Step 2: Convert to fraction form
   2,605.61/5,430.48 = 5,430.48/x
3. Step 3: Cross multiply
   2,605.61x = 5,430.48 × 5,430.48
4. Step 4: Simplify right side
   2,605.61x = 29,490,118.12
5. Step 5: Solve for x
   x = 29,490,118.12/2,605.61
6. Step 6: Final answer
   x = 11,317.95