Finding the Fourth Proportional to 28,105.48, 42,154.37 and 9,385.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,105.48 : 42,154.37 = 9,385.12 : x
2. Step 2: Convert to fraction form
   28,105.48/42,154.37 = 9,385.12/x
3. Step 3: Cross multiply
   28,105.48x = 42,154.37 × 9,385.12
4. Step 4: Simplify right side
   28,105.48x = 395,623,677.61
5. Step 5: Solve for x
   x = 395,623,677.61/28,105.48
6. Step 6: Final answer
   x = 14,076.39