Finding the Fourth Proportional to 7,856.99, 10,842.62 and 4,672.47

Step by Step Solution

1. Step 1: Write the proportion equation
   7,856.99 : 10,842.62 = 4,672.47 : x
2. Step 2: Convert to fraction form
   7,856.99/10,842.62 = 4,672.47/x
3. Step 3: Cross multiply
   7,856.99x = 10,842.62 × 4,672.47
4. Step 4: Simplify right side
   7,856.99x = 50,661,793.31
5. Step 5: Solve for x
   x = 50,661,793.31/7,856.99
6. Step 6: Final answer
   x = 6,447.99