Finding the Fourth Proportional to 10,805.45, 14,877.59 and 9,187.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,805.45 : 14,877.59 = 9,187.18 : x
2. Step 2: Convert to fraction form
   10,805.45/14,877.59 = 9,187.18/x
3. Step 3: Cross multiply
   10,805.45x = 14,877.59 × 9,187.18
4. Step 4: Simplify right side
   10,805.45x = 136,683,097.30
5. Step 5: Solve for x
   x = 136,683,097.30/10,805.45
6. Step 6: Final answer
   x = 12,649.46