Finding the Fourth Proportional to 12,925.31, 19,391.30 and 5,424.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,925.31 : 19,391.30 = 5,424.84 : x
2. Step 2: Convert to fraction form
   12,925.31/19,391.30 = 5,424.84/x
3. Step 3: Cross multiply
   12,925.31x = 19,391.30 × 5,424.84
4. Step 4: Simplify right side
   12,925.31x = 105,194,672.77
5. Step 5: Solve for x
   x = 105,194,672.77/12,925.31
6. Step 6: Final answer
   x = 8,138.66