Finding the Fourth Proportional to 55,439.83, 83,192.55 and 20,404.09

Step by Step Solution

1. Step 1: Write the proportion equation
   55,439.83 : 83,192.55 = 20,404.09 : x
2. Step 2: Convert to fraction form
   55,439.83/83,192.55 = 20,404.09/x
3. Step 3: Cross multiply
   55,439.83x = 83,192.55 × 20,404.09
4. Step 4: Simplify right side
   55,439.83x = 1,697,468,277.53
5. Step 5: Solve for x
   x = 1,697,468,277.53/55,439.83
6. Step 6: Final answer
   x = 30,618.21