Finding the Fourth Proportional to 28,200.06, 42,294.69 and 9,480.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,200.06 : 42,294.69 = 9,480.42 : x
2. Step 2: Convert to fraction form
   28,200.06/42,294.69 = 9,480.42/x
3. Step 3: Cross multiply
   28,200.06x = 42,294.69 × 9,480.42
4. Step 4: Simplify right side
   28,200.06x = 400,971,424.97
5. Step 5: Solve for x
   x = 400,971,424.97/28,200.06
6. Step 6: Final answer
   x = 14,218.81