Finding the Fourth Proportional to 9,856.86, 14,790.76 and 5,476.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,856.86 : 14,790.76 = 5,476.80 : x
2. Step 2: Convert to fraction form
   9,856.86/14,790.76 = 5,476.80/x
3. Step 3: Cross multiply
   9,856.86x = 14,790.76 × 5,476.80
4. Step 4: Simplify right side
   9,856.86x = 81,006,034.37
5. Step 5: Solve for x
   x = 81,006,034.37/9,856.86
6. Step 6: Final answer
   x = 8,218.24