Finding the Third Proportional to 12,420.56 and 18,583.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,420.56 : 18,583.59 = 18,583.59 : x
2. Step 2: Convert to fraction form
   12,420.56/18,583.59 = 18,583.59/x
3. Step 3: Cross multiply
   12,420.56x = 18,583.59 × 18,583.59
4. Step 4: Simplify right side
   12,420.56x = 345,349,956.67
5. Step 5: Solve for x
   x = 345,349,956.67/12,420.56
6. Step 6: Final answer
   x = 27,804.70