Finding the Fourth Proportional to 19,383.90, 26,738.55 and 13,085.34

Step by Step Solution

1. Step 1: Write the proportion equation
   19,383.90 : 26,738.55 = 13,085.34 : x
2. Step 2: Convert to fraction form
   19,383.90/26,738.55 = 13,085.34/x
3. Step 3: Cross multiply
   19,383.90x = 26,738.55 × 13,085.34
4. Step 4: Simplify right side
   19,383.90x = 349,883,017.86
5. Step 5: Solve for x
   x = 349,883,017.86/19,383.90
6. Step 6: Final answer
   x = 18,050.19