Finding the Fourth Proportional to 55,442.21, 83,196.12 and 20,406.47

Step by Step Solution

1. Step 1: Write the proportion equation
   55,442.21 : 83,196.12 = 20,406.47 : x
2. Step 2: Convert to fraction form
   55,442.21/83,196.12 = 20,406.47/x
3. Step 3: Cross multiply
   55,442.21x = 83,196.12 × 20,406.47
4. Step 4: Simplify right side
   55,442.21x = 1,697,738,710.92
5. Step 5: Solve for x
   x = 1,697,738,710.92/55,442.21
6. Step 6: Final answer
   x = 30,621.77