Finding the Fourth Proportional to 11,947.91, 16,483.50 and 7,698.65

Step by Step Solution

1. Step 1: Write the proportion equation
   11,947.91 : 16,483.50 = 7,698.65 : x
2. Step 2: Convert to fraction form
   11,947.91/16,483.50 = 7,698.65/x
3. Step 3: Cross multiply
   11,947.91x = 16,483.50 × 7,698.65
4. Step 4: Simplify right side
   11,947.91x = 126,900,614.86
5. Step 5: Solve for x
   x = 126,900,614.86/11,947.91
6. Step 6: Final answer
   x = 10,621.16