Finding the Fourth Proportional to 14,185.08, 21,290.78 and 7,170.05

Step by Step Solution

1. Step 1: Write the proportion equation
   14,185.08 : 21,290.78 = 7,170.05 : x
2. Step 2: Convert to fraction form
   14,185.08/21,290.78 = 7,170.05/x
3. Step 3: Cross multiply
   14,185.08x = 21,290.78 × 7,170.05
4. Step 4: Simplify right side
   14,185.08x = 152,655,814.83
5. Step 5: Solve for x
   x = 152,655,814.83/14,185.08
6. Step 6: Final answer
   x = 10,761.72