Finding the Fourth Proportional to 22,785.34, 31,445.94 and 13,830.79

Step by Step Solution

1. Step 1: Write the proportion equation
   22,785.34 : 31,445.94 = 13,830.79 : x
2. Step 2: Convert to fraction form
   22,785.34/31,445.94 = 13,830.79/x
3. Step 3: Cross multiply
   22,785.34x = 31,445.94 × 13,830.79
4. Step 4: Simplify right side
   22,785.34x = 434,922,192.49
5. Step 5: Solve for x
   x = 434,922,192.49/22,785.34
6. Step 6: Final answer
   x = 19,087.81