Finding the Fourth Proportional to 22,389.15, 30,893.58 and 12,955.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,389.15 : 30,893.58 = 12,955.89 : x
2. Step 2: Convert to fraction form
   22,389.15/30,893.58 = 12,955.89/x
3. Step 3: Cross multiply
   22,389.15x = 30,893.58 × 12,955.89
4. Step 4: Simplify right side
   22,389.15x = 400,253,824.19
5. Step 5: Solve for x
   x = 400,253,824.19/22,389.15
6. Step 6: Final answer
   x = 17,877.13