Finding the Fourth Proportional to 12,672.70, 19,011.76 and 3,788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,672.70 : 19,011.76 = 3,788.72 : x
2. Step 2: Convert to fraction form
   12,672.70/19,011.76 = 3,788.72/x
3. Step 3: Cross multiply
   12,672.70x = 19,011.76 × 3,788.72
4. Step 4: Simplify right side
   12,672.70x = 72,030,292.35
5. Step 5: Solve for x
   x = 72,030,292.35/12,672.70
6. Step 6: Final answer
   x = 5,683.90