Finding the Fourth Proportional to 12,191.58, 18,281.60 and 5,615.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,191.58 : 18,281.60 = 5,615.82 : x
2. Step 2: Convert to fraction form
   12,191.58/18,281.60 = 5,615.82/x
3. Step 3: Cross multiply
   12,191.58x = 18,281.60 × 5,615.82
4. Step 4: Simplify right side
   12,191.58x = 102,666,174.91
5. Step 5: Solve for x
   x = 102,666,174.91/12,191.58
6. Step 6: Final answer
   x = 8,421.07