Finding the Fourth Proportional to 21,081.93, 31,607.52 and 12,184.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,081.93 : 31,607.52 = 12,184.71 : x
2. Step 2: Convert to fraction form
   21,081.93/31,607.52 = 12,184.71/x
3. Step 3: Cross multiply
   21,081.93x = 31,607.52 × 12,184.71
4. Step 4: Simplify right side
   21,081.93x = 385,128,465.02
5. Step 5: Solve for x
   x = 385,128,465.02/21,081.93
6. Step 6: Final answer
   x = 18,268.18