Finding the Fourth Proportional to 21,081.48, 29,093.58 and 12,130.35

Step by Step Solution

1. Step 1: Write the proportion equation
   21,081.48 : 29,093.58 = 12,130.35 : x
2. Step 2: Convert to fraction form
   21,081.48/29,093.58 = 12,130.35/x
3. Step 3: Cross multiply
   21,081.48x = 29,093.58 × 12,130.35
4. Step 4: Simplify right side
   21,081.48x = 352,915,308.15
5. Step 5: Solve for x
   x = 352,915,308.15/21,081.48
6. Step 6: Final answer
   x = 16,740.54