Finding the Fourth Proportional to 21,300.86, 29,396.18 and 12,351.17

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.86 : 29,396.18 = 12,351.17 : x
2. Step 2: Convert to fraction form
   21,300.86/29,396.18 = 12,351.17/x
3. Step 3: Cross multiply
   21,300.86x = 29,396.18 × 12,351.17
4. Step 4: Simplify right side
   21,300.86x = 363,077,216.53
5. Step 5: Solve for x
   x = 363,077,216.53/21,300.86
6. Step 6: Final answer
   x = 17,045.19