Finding the Fourth Proportional to 12,421.86, 18,619.83 and 5,031.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,421.86 : 18,619.83 = 5,031.42 : x
2. Step 2: Convert to fraction form
   12,421.86/18,619.83 = 5,031.42/x
3. Step 3: Cross multiply
   12,421.86x = 18,619.83 × 5,031.42
4. Step 4: Simplify right side
   12,421.86x = 93,684,185.06
5. Step 5: Solve for x
   x = 93,684,185.06/12,421.86
6. Step 6: Final answer
   x = 7,541.88