Finding the Fourth Proportional to 11,931.72, 16,467.28 and 7,215.98

Step by Step Solution

1. Step 1: Write the proportion equation
   11,931.72 : 16,467.28 = 7,215.98 : x
2. Step 2: Convert to fraction form
   11,931.72/16,467.28 = 7,215.98/x
3. Step 3: Cross multiply
   11,931.72x = 16,467.28 × 7,215.98
4. Step 4: Simplify right side
   11,931.72x = 118,827,563.13
5. Step 5: Solve for x
   x = 118,827,563.13/11,931.72
6. Step 6: Final answer
   x = 9,958.96