Finding the Fourth Proportional to 11,931.69, 17,897.70 and 3,166.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,931.69 : 17,897.70 = 3,166.56 : x
2. Step 2: Convert to fraction form
   11,931.69/17,897.70 = 3,166.56/x
3. Step 3: Cross multiply
   11,931.69x = 17,897.70 × 3,166.56
4. Step 4: Simplify right side
   11,931.69x = 56,674,140.91
5. Step 5: Solve for x
   x = 56,674,140.91/11,931.69
6. Step 6: Final answer
   x = 4,749.88