Finding the Fourth Proportional to 28,523.30, 42,792.24 and 10,988.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,523.30 : 42,792.24 = 10,988.42 : x
2. Step 2: Convert to fraction form
   28,523.30/42,792.24 = 10,988.42/x
3. Step 3: Cross multiply
   28,523.30x = 42,792.24 × 10,988.42
4. Step 4: Simplify right side
   28,523.30x = 470,219,105.86
5. Step 5: Solve for x
   x = 470,219,105.86/28,523.30
6. Step 6: Final answer
   x = 16,485.44