Finding the Fourth Proportional to 28,518.30, 42,784.74 and 10,983.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,518.30 : 42,784.74 = 10,983.42 : x
2. Step 2: Convert to fraction form
   28,518.30/42,784.74 = 10,983.42/x
3. Step 3: Cross multiply
   28,518.30x = 42,784.74 × 10,983.42
4. Step 4: Simplify right side
   28,518.30x = 469,922,769.01
5. Step 5: Solve for x
   x = 469,922,769.01/28,518.30
6. Step 6: Final answer
   x = 16,477.94