Finding the Fourth Proportional to 38,085.33, 57,131.82 and 13,122.12

Step by Step Solution

1. Step 1: Write the proportion equation
   38,085.33 : 57,131.82 = 13,122.12 : x
2. Step 2: Convert to fraction form
   38,085.33/57,131.82 = 13,122.12/x
3. Step 3: Cross multiply
   38,085.33x = 57,131.82 × 13,122.12
4. Step 4: Simplify right side
   38,085.33x = 749,690,597.86
5. Step 5: Solve for x
   x = 749,690,597.86/38,085.33
6. Step 6: Final answer
   x = 19,684.50