Finding the Fourth Proportional to 13,076.72, 19,614.88 and 5,280

Step by Step Solution

1. Step 1: Write the proportion equation
   13,076.72 : 19,614.88 = 5,280 : x
2. Step 2: Convert to fraction form
   13,076.72/19,614.88 = 5,280/x
3. Step 3: Cross multiply
   13,076.72x = 19,614.88 × 5,280
4. Step 4: Simplify right side
   13,076.72x = 103,566,566.40
5. Step 5: Solve for x
   x = 103,566,566.40/13,076.72
6. Step 6: Final answer
   x = 7,919.92