Finding the Fourth Proportional to 22,381.31, 30,885.55 and 12,309.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,381.31 : 30,885.55 = 12,309.74 : x
2. Step 2: Convert to fraction form
   22,381.31/30,885.55 = 12,309.74/x
3. Step 3: Cross multiply
   22,381.31x = 30,885.55 × 12,309.74
4. Step 4: Simplify right side
   22,381.31x = 380,193,090.26
5. Step 5: Solve for x
   x = 380,193,090.26/22,381.31
6. Step 6: Final answer
   x = 16,987.08