Finding the Fourth Proportional to 12,667.32, 19,003.42 and 5,267.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.32 : 19,003.42 = 5,267.80 : x
2. Step 2: Convert to fraction form
   12,667.32/19,003.42 = 5,267.80/x
3. Step 3: Cross multiply
   12,667.32x = 19,003.42 × 5,267.80
4. Step 4: Simplify right side
   12,667.32x = 100,106,215.88
5. Step 5: Solve for x
   x = 100,106,215.88/12,667.32
6. Step 6: Final answer
   x = 7,902.71