Finding the Fourth Proportional to 11,881.38, 17,820.45 and 3,116.37

Step by Step Solution

1. Step 1: Write the proportion equation
   11,881.38 : 17,820.45 = 3,116.37 : x
2. Step 2: Convert to fraction form
   11,881.38/17,820.45 = 3,116.37/x
3. Step 3: Cross multiply
   11,881.38x = 17,820.45 × 3,116.37
4. Step 4: Simplify right side
   11,881.38x = 55,535,115.77
5. Step 5: Solve for x
   x = 55,535,115.77/11,881.38
6. Step 6: Final answer
   x = 4,674.13