Finding the Fourth Proportional to 9,431.98, 14,139.17 and 3,187.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,431.98 : 14,139.17 = 3,187.63 : x
2. Step 2: Convert to fraction form
   9,431.98/14,139.17 = 3,187.63/x
3. Step 3: Cross multiply
   9,431.98x = 14,139.17 × 3,187.63
4. Step 4: Simplify right side
   9,431.98x = 45,070,379.74
5. Step 5: Solve for x
   x = 45,070,379.74/9,431.98
6. Step 6: Final answer
   x = 4,778.47