Finding the Fourth Proportional to 21,618.52, 29,833.86 and 12,058.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,618.52 : 29,833.86 = 12,058.12 : x
2. Step 2: Convert to fraction form
   21,618.52/29,833.86 = 12,058.12/x
3. Step 3: Cross multiply
   21,618.52x = 29,833.86 × 12,058.12
4. Step 4: Simplify right side
   21,618.52x = 359,740,263.94
5. Step 5: Solve for x
   x = 359,740,263.94/21,618.52
6. Step 6: Final answer
   x = 16,640.37