Finding the Fourth Proportional to 28,443.13, 42,664.54 and 7,383.15

Step by Step Solution

1. Step 1: Write the proportion equation
   28,443.13 : 42,664.54 = 7,383.15 : x
2. Step 2: Convert to fraction form
   28,443.13/42,664.54 = 7,383.15/x
3. Step 3: Cross multiply
   28,443.13x = 42,664.54 × 7,383.15
4. Step 4: Simplify right side
   28,443.13x = 314,998,698.50
5. Step 5: Solve for x
   x = 314,998,698.50/28,443.13
6. Step 6: Final answer
   x = 11,074.68