Finding the Fourth Proportional to 12,810.06, 17,690.09 and 12,111.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,810.06 : 17,690.09 = 12,111.15 : x
2. Step 2: Convert to fraction form
   12,810.06/17,690.09 = 12,111.15/x
3. Step 3: Cross multiply
   12,810.06x = 17,690.09 × 12,111.15
4. Step 4: Simplify right side
   12,810.06x = 214,247,333.50
5. Step 5: Solve for x
   x = 214,247,333.50/12,810.06
6. Step 6: Final answer
   x = 16,724.93