Finding the Fourth Proportional to 12,940.30, 19,410.54 and 5,538.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.30 : 19,410.54 = 5,538.52 : x
2. Step 2: Convert to fraction form
   12,940.30/19,410.54 = 5,538.52/x
3. Step 3: Cross multiply
   12,940.30x = 19,410.54 × 5,538.52
4. Step 4: Simplify right side
   12,940.30x = 107,505,664.00
5. Step 5: Solve for x
   x = 107,505,664.00/12,940.30
6. Step 6: Final answer
   x = 8,307.82