Finding the Fourth Proportional to 11,931.57, 17,897.69 and 3,166.49

Step by Step Solution

1. Step 1: Write the proportion equation
   11,931.57 : 17,897.69 = 3,166.49 : x
2. Step 2: Convert to fraction form
   11,931.57/17,897.69 = 3,166.49/x
3. Step 3: Cross multiply
   11,931.57x = 17,897.69 × 3,166.49
4. Step 4: Simplify right side
   11,931.57x = 56,672,909.07
5. Step 5: Solve for x
   x = 56,672,909.07/11,931.57
6. Step 6: Final answer
   x = 4,749.83