Finding the Fourth Proportional to 21,917.07, 32,883.89 and 13,158.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,917.07 : 32,883.89 = 13,158.09 : x
2. Step 2: Convert to fraction form
   21,917.07/32,883.89 = 13,158.09/x
3. Step 3: Cross multiply
   21,917.07x = 32,883.89 × 13,158.09
4. Step 4: Simplify right side
   21,917.07x = 432,689,118.38
5. Step 5: Solve for x
   x = 432,689,118.38/21,917.07
6. Step 6: Final answer
   x = 19,742.11