Finding the Fourth Proportional to 11,896.61, 17,845.92 and 3,131.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,896.61 : 17,845.92 = 3,131.46 : x
2. Step 2: Convert to fraction form
   11,896.61/17,845.92 = 3,131.46/x
3. Step 3: Cross multiply
   11,896.61x = 17,845.92 × 3,131.46
4. Step 4: Simplify right side
   11,896.61x = 55,883,784.64
5. Step 5: Solve for x
   x = 55,883,784.64/11,896.61
6. Step 6: Final answer
   x = 4,697.46