Finding the Fourth Proportional to 12,960.30, 19,440.54 and 5,558.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960.30 : 19,440.54 = 5,558.52 : x
2. Step 2: Convert to fraction form
   12,960.30/19,440.54 = 5,558.52/x
3. Step 3: Cross multiply
   12,960.30x = 19,440.54 × 5,558.52
4. Step 4: Simplify right side
   12,960.30x = 108,060,630.40
5. Step 5: Solve for x
   x = 108,060,630.40/12,960.30
6. Step 6: Final answer
   x = 8,337.82