Finding the Fourth Proportional to 21,788.59, 30,064.71 and 12,360.19

Step by Step Solution

1. Step 1: Write the proportion equation
   21,788.59 : 30,064.71 = 12,360.19 : x
2. Step 2: Convert to fraction form
   21,788.59/30,064.71 = 12,360.19/x
3. Step 3: Cross multiply
   21,788.59x = 30,064.71 × 12,360.19
4. Step 4: Simplify right side
   21,788.59x = 371,605,527.89
5. Step 5: Solve for x
   x = 371,605,527.89/21,788.59
6. Step 6: Final answer
   x = 17,055.05