Finding the Fourth Proportional to 7,388.15, 11,085.43 and 3,877.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,388.15 : 11,085.43 = 3,877.31 : x
2. Step 2: Convert to fraction form
   7,388.15/11,085.43 = 3,877.31/x
3. Step 3: Cross multiply
   7,388.15x = 11,085.43 × 3,877.31
4. Step 4: Simplify right side
   7,388.15x = 42,981,648.59
5. Step 5: Solve for x
   x = 42,981,648.59/7,388.15
6. Step 6: Final answer
   x = 5,817.65