Finding the Fourth Proportional to 10,511.50, 15,772.71 and 4,276.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,511.50 : 15,772.71 = 4,276.12 : x
2. Step 2: Convert to fraction form
   10,511.50/15,772.71 = 4,276.12/x
3. Step 3: Cross multiply
   10,511.50x = 15,772.71 × 4,276.12
4. Step 4: Simplify right side
   10,511.50x = 67,445,956.49
5. Step 5: Solve for x
   x = 67,445,956.49/10,511.50
6. Step 6: Final answer
   x = 6,416.40