Finding the Fourth Proportional to 28,383.33, 42,536.34 and 13,388.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,383.33 : 42,536.34 = 13,388.10 : x
2. Step 2: Convert to fraction form
   28,383.33/42,536.34 = 13,388.10/x
3. Step 3: Cross multiply
   28,383.33x = 42,536.34 × 13,388.10
4. Step 4: Simplify right side
   28,383.33x = 569,480,773.55
5. Step 5: Solve for x
   x = 569,480,773.55/28,383.33
6. Step 6: Final answer
   x = 20,063.92