Finding the Fourth Proportional to 10,081.20, 15,112.49 and 5,404.46

Step by Step Solution

1. Step 1: Write the proportion equation
   10,081.20 : 15,112.49 = 5,404.46 : x
2. Step 2: Convert to fraction form
   10,081.20/15,112.49 = 5,404.46/x
3. Step 3: Cross multiply
   10,081.20x = 15,112.49 × 5,404.46
4. Step 4: Simplify right side
   10,081.20x = 81,674,858.46
5. Step 5: Solve for x
   x = 81,674,858.46/10,081.20
6. Step 6: Final answer
   x = 8,101.70