Finding the Fourth Proportional to 55,541.12, 83,319.59 and 20,478.05

Step by Step Solution

1. Step 1: Write the proportion equation
   55,541.12 : 83,319.59 = 20,478.05 : x
2. Step 2: Convert to fraction form
   55,541.12/83,319.59 = 20,478.05/x
3. Step 3: Cross multiply
   55,541.12x = 83,319.59 × 20,478.05
4. Step 4: Simplify right side
   55,541.12x = 1,706,222,627.61
5. Step 5: Solve for x
   x = 1,706,222,627.61/55,541.12
6. Step 6: Final answer
   x = 30,719.99