Finding the Fourth Proportional to 22,420.86, 30,939.58 and 12,347.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,420.86 : 30,939.58 = 12,347.34 : x
2. Step 2: Convert to fraction form
   22,420.86/30,939.58 = 12,347.34/x
3. Step 3: Cross multiply
   22,420.86x = 30,939.58 × 12,347.34
4. Step 4: Simplify right side
   22,420.86x = 382,021,513.72
5. Step 5: Solve for x
   x = 382,021,513.72/22,420.86
6. Step 6: Final answer
   x = 17,038.66