Finding the Fourth Proportional to 9,019.13, 12,442.05 and 5,660.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,019.13 : 12,442.05 = 5,660.28 : x
2. Step 2: Convert to fraction form
   9,019.13/12,442.05 = 5,660.28/x
3. Step 3: Cross multiply
   9,019.13x = 12,442.05 × 5,660.28
4. Step 4: Simplify right side
   9,019.13x = 70,425,486.77
5. Step 5: Solve for x
   x = 70,425,486.77/9,019.13
6. Step 6: Final answer
   x = 7,808.46