Finding the Fourth Proportional to 21,317.58, 29,411.10 and 12,361.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,317.58 : 29,411.10 = 12,361.82 : x
2. Step 2: Convert to fraction form
   21,317.58/29,411.10 = 12,361.82/x
3. Step 3: Cross multiply
   21,317.58x = 29,411.10 × 12,361.82
4. Step 4: Simplify right side
   21,317.58x = 363,574,577.15
5. Step 5: Solve for x
   x = 363,574,577.15/21,317.58
6. Step 6: Final answer
   x = 17,055.15