Finding the Fourth Proportional to 12,667.74, 19,003.66 and 5,272.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.74 : 19,003.66 = 5,272.49 : x
2. Step 2: Convert to fraction form
   12,667.74/19,003.66 = 5,272.49/x
3. Step 3: Cross multiply
   12,667.74x = 19,003.66 × 5,272.49
4. Step 4: Simplify right side
   12,667.74x = 100,196,671.30
5. Step 5: Solve for x
   x = 100,196,671.30/12,667.74
6. Step 6: Final answer
   x = 7,909.59