Finding the Fourth Proportional to 9,818.58, 14,730.61 and 5,439.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,818.58 : 14,730.61 = 5,439.12 : x
2. Step 2: Convert to fraction form
   9,818.58/14,730.61 = 5,439.12/x
3. Step 3: Cross multiply
   9,818.58x = 14,730.61 × 5,439.12
4. Step 4: Simplify right side
   9,818.58x = 80,121,496.82
5. Step 5: Solve for x
   x = 80,121,496.82/9,818.58
6. Step 6: Final answer
   x = 8,160.19