Finding the Fourth Proportional to 13,930.18, 19,212.90 and 9,681.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,930.18 : 19,212.90 = 9,681.15 : x
2. Step 2: Convert to fraction form
   13,930.18/19,212.90 = 9,681.15/x
3. Step 3: Cross multiply
   13,930.18x = 19,212.90 × 9,681.15
4. Step 4: Simplify right side
   13,930.18x = 186,003,002.58
5. Step 5: Solve for x
   x = 186,003,002.58/13,930.18
6. Step 6: Final answer
   x = 13,352.52