Finding the Fourth Proportional to 12,798.18, 19,164.06 and 10,961.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,798.18 : 19,164.06 = 10,961.10 : x
2. Step 2: Convert to fraction form
   12,798.18/19,164.06 = 10,961.10/x
3. Step 3: Cross multiply
   12,798.18x = 19,164.06 × 10,961.10
4. Step 4: Simplify right side
   12,798.18x = 210,059,178.07
5. Step 5: Solve for x
   x = 210,059,178.07/12,798.18
6. Step 6: Final answer
   x = 16,413.21