Finding the Fourth Proportional to 10,761.81, 14,810.85 and 9,105

Step by Step Solution

1. Step 1: Write the proportion equation
   10,761.81 : 14,810.85 = 9,105 : x
2. Step 2: Convert to fraction form
   10,761.81/14,810.85 = 9,105/x
3. Step 3: Cross multiply
   10,761.81x = 14,810.85 × 9,105
4. Step 4: Simplify right side
   10,761.81x = 134,852,789.25
5. Step 5: Solve for x
   x = 134,852,789.25/10,761.81
6. Step 6: Final answer
   x = 12,530.68