Finding the Fourth Proportional to 28,399.35, 42,420.01 and 27,612.03

Step by Step Solution

1. Step 1: Write the proportion equation
   28,399.35 : 42,420.01 = 27,612.03 : x
2. Step 2: Convert to fraction form
   28,399.35/42,420.01 = 27,612.03/x
3. Step 3: Cross multiply
   28,399.35x = 42,420.01 × 27,612.03
4. Step 4: Simplify right side
   28,399.35x = 1,171,302,519.69
5. Step 5: Solve for x
   x = 1,171,302,519.69/28,399.35
6. Step 6: Final answer
   x = 41,243.99