Finding the Fourth Proportional to 12,667.35, 18,999.30 and 3,308.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.35 : 18,999.30 = 3,308.10 : x
2. Step 2: Convert to fraction form
   12,667.35/18,999.30 = 3,308.10/x
3. Step 3: Cross multiply
   12,667.35x = 18,999.30 × 3,308.10
4. Step 4: Simplify right side
   12,667.35x = 62,851,584.33
5. Step 5: Solve for x
   x = 62,851,584.33/12,667.35
6. Step 6: Final answer
   x = 4,961.70