Finding the Fourth Proportional to 21,408.17, 29,539.82 and 13,444.77

Step by Step Solution

1. Step 1: Write the proportion equation
   21,408.17 : 29,539.82 = 13,444.77 : x
2. Step 2: Convert to fraction form
   21,408.17/29,539.82 = 13,444.77/x
3. Step 3: Cross multiply
   21,408.17x = 29,539.82 × 13,444.77
4. Step 4: Simplify right side
   21,408.17x = 397,156,018.52
5. Step 5: Solve for x
   x = 397,156,018.52/21,408.17
6. Step 6: Final answer
   x = 18,551.61