Finding the Fourth Proportional to 10,517.98, 15,783 and 4,276.84

Step by Step Solution

1. Step 1: Write the proportion equation
   10,517.98 : 15,783 = 4,276.84 : x
2. Step 2: Convert to fraction form
   10,517.98/15,783 = 4,276.84/x
3. Step 3: Cross multiply
   10,517.98x = 15,783 × 4,276.84
4. Step 4: Simplify right side
   10,517.98x = 67,501,365.72
5. Step 5: Solve for x
   x = 67,501,365.72/10,517.98
6. Step 6: Final answer
   x = 6,417.71