Finding the Third Proportional to 5,475.09 and 12,918.87

Step by Step Solution

1. Step 1: Write the proportion equation
   5,475.09 : 12,918.87 = 12,918.87 : x
2. Step 2: Convert to fraction form
   5,475.09/12,918.87 = 12,918.87/x
3. Step 3: Cross multiply
   5,475.09x = 12,918.87 × 12,918.87
4. Step 4: Simplify right side
   5,475.09x = 166,897,129.41
5. Step 5: Solve for x
   x = 166,897,129.41/5,475.09
6. Step 6: Final answer
   x = 30,482.97