Finding the Fourth Proportional to 19,512.28, 29,272.72 and 7,667.20

Step by Step Solution

1. Step 1: Write the proportion equation
   19,512.28 : 29,272.72 = 7,667.20 : x
2. Step 2: Convert to fraction form
   19,512.28/29,272.72 = 7,667.20/x
3. Step 3: Cross multiply
   19,512.28x = 29,272.72 × 7,667.20
4. Step 4: Simplify right side
   19,512.28x = 224,439,798.78
5. Step 5: Solve for x
   x = 224,439,798.78/19,512.28
6. Step 6: Final answer
   x = 11,502.49