Finding the Fourth Proportional to 22,019.58, 30,381.75 and 12,585.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,019.58 : 30,381.75 = 12,585.78 : x
2. Step 2: Convert to fraction form
   22,019.58/30,381.75 = 12,585.78/x
3. Step 3: Cross multiply
   22,019.58x = 30,381.75 × 12,585.78
4. Step 4: Simplify right side
   22,019.58x = 382,378,021.52
5. Step 5: Solve for x
   x = 382,378,021.52/22,019.58
6. Step 6: Final answer
   x = 17,365.36