Finding the Fourth Proportional to 21,078.58, 29,094.51 and 13,913.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,078.58 : 29,094.51 = 13,913.72 : x
2. Step 2: Convert to fraction form
   21,078.58/29,094.51 = 13,913.72/x
3. Step 3: Cross multiply
   21,078.58x = 29,094.51 × 13,913.72
4. Step 4: Simplify right side
   21,078.58x = 404,812,865.68
5. Step 5: Solve for x
   x = 404,812,865.68/21,078.58
6. Step 6: Final answer
   x = 19,204.94