Finding the Fourth Proportional to 9,318.72, 13,978.48 and 3,079.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,318.72 : 13,978.48 = 3,079.24 : x
2. Step 2: Convert to fraction form
   9,318.72/13,978.48 = 3,079.24/x
3. Step 3: Cross multiply
   9,318.72x = 13,978.48 × 3,079.24
4. Step 4: Simplify right side
   9,318.72x = 43,043,094.76
5. Step 5: Solve for x
   x = 43,043,094.76/9,318.72
6. Step 6: Final answer
   x = 4,618.99