Finding the Fourth Proportional to 10,854.68, 16,289.91 and 7,164.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,854.68 : 16,289.91 = 7,164.72 : x
2. Step 2: Convert to fraction form
   10,854.68/16,289.91 = 7,164.72/x
3. Step 3: Cross multiply
   10,854.68x = 16,289.91 × 7,164.72
4. Step 4: Simplify right side
   10,854.68x = 116,712,643.98
5. Step 5: Solve for x
   x = 116,712,643.98/10,854.68
6. Step 6: Final answer
   x = 10,752.29