Finding the Fourth Proportional to 12,925.80, 19,392.04 and 5,425.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,925.80 : 19,392.04 = 5,425.34 : x
2. Step 2: Convert to fraction form
   12,925.80/19,392.04 = 5,425.34/x
3. Step 3: Cross multiply
   12,925.80x = 19,392.04 × 5,425.34
4. Step 4: Simplify right side
   12,925.80x = 105,208,410.29
5. Step 5: Solve for x
   x = 105,208,410.29/12,925.80
6. Step 6: Final answer
   x = 8,139.41