Finding the Fourth Proportional to 22,393.86, 30,903.10 and 12,321.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,393.86 : 30,903.10 = 12,321.72 : x
2. Step 2: Convert to fraction form
   22,393.86/30,903.10 = 12,321.72/x
3. Step 3: Cross multiply
   22,393.86x = 30,903.10 × 12,321.72
4. Step 4: Simplify right side
   22,393.86x = 380,779,345.33
5. Step 5: Solve for x
   x = 380,779,345.33/22,393.86
6. Step 6: Final answer
   x = 17,003.74