Finding the Fourth Proportional to 21,513.16, 29,688.83 and 12,081.93

Step by Step Solution

1. Step 1: Write the proportion equation
   21,513.16 : 29,688.83 = 12,081.93 : x
2. Step 2: Convert to fraction form
   21,513.16/29,688.83 = 12,081.93/x
3. Step 3: Cross multiply
   21,513.16x = 29,688.83 × 12,081.93
4. Step 4: Simplify right side
   21,513.16x = 358,698,156.99
5. Step 5: Solve for x
   x = 358,698,156.99/21,513.16
6. Step 6: Final answer
   x = 16,673.43