Finding the Fourth Proportional to 12,693.90, 19,049.30 and 5,671.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,693.90 : 19,049.30 = 5,671.58 : x
2. Step 2: Convert to fraction form
   12,693.90/19,049.30 = 5,671.58/x
3. Step 3: Cross multiply
   12,693.90x = 19,049.30 × 5,671.58
4. Step 4: Simplify right side
   12,693.90x = 108,039,628.89
5. Step 5: Solve for x
   x = 108,039,628.89/12,693.90
6. Step 6: Final answer
   x = 8,511.15