Finding the Third Proportional to 5,518.13 and 12,951.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,518.13 : 12,951.56 = 12,951.56 : x
2. Step 2: Convert to fraction form
   5,518.13/12,951.56 = 12,951.56/x
3. Step 3: Cross multiply
   5,518.13x = 12,951.56 × 12,951.56
4. Step 4: Simplify right side
   5,518.13x = 167,742,971.19
5. Step 5: Solve for x
   x = 167,742,971.19/5,518.13
6. Step 6: Final answer
   x = 30,398.55