Finding the Fourth Proportional to 6,471.48, 9,711.86 and 4,386.30

Step by Step Solution

1. Step 1: Write the proportion equation
   6,471.48 : 9,711.86 = 4,386.30 : x
2. Step 2: Convert to fraction form
   6,471.48/9,711.86 = 4,386.30/x
3. Step 3: Cross multiply
   6,471.48x = 9,711.86 × 4,386.30
4. Step 4: Simplify right side
   6,471.48x = 42,599,131.52
5. Step 5: Solve for x
   x = 42,599,131.52/6,471.48
6. Step 6: Final answer
   x = 6,582.59