Finding the Fourth Proportional to 21,374.48, 29,498.28 and 13,922.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,374.48 : 29,498.28 = 13,922.48 : x
2. Step 2: Convert to fraction form
   21,374.48/29,498.28 = 13,922.48/x
3. Step 3: Cross multiply
   21,374.48x = 29,498.28 × 13,922.48
4. Step 4: Simplify right side
   21,374.48x = 410,689,213.33
5. Step 5: Solve for x
   x = 410,689,213.33/21,374.48
6. Step 6: Final answer
   x = 19,214.00