Finding the Fourth Proportional to 55,601.51, 83,390.72 and 20,517.17

Step by Step Solution

1. Step 1: Write the proportion equation
   55,601.51 : 83,390.72 = 20,517.17 : x
2. Step 2: Convert to fraction form
   55,601.51/83,390.72 = 20,517.17/x
3. Step 3: Cross multiply
   55,601.51x = 83,390.72 × 20,517.17
4. Step 4: Simplify right side
   55,601.51x = 1,710,941,059.12
5. Step 5: Solve for x
   x = 1,710,941,059.12/55,601.51
6. Step 6: Final answer
   x = 30,771.49