Finding the Fourth Proportional to 21,852.05, 30,155.32 and 13,354.13

Step by Step Solution

1. Step 1: Write the proportion equation
   21,852.05 : 30,155.32 = 13,354.13 : x
2. Step 2: Convert to fraction form
   21,852.05/30,155.32 = 13,354.13/x
3. Step 3: Cross multiply
   21,852.05x = 30,155.32 × 13,354.13
4. Step 4: Simplify right side
   21,852.05x = 402,698,155.55
5. Step 5: Solve for x
   x = 402,698,155.55/21,852.05
6. Step 6: Final answer
   x = 18,428.40