Finding the Fourth Proportional to 55,018.72, 82,528.16 and 19,958.40

Step by Step Solution

1. Step 1: Write the proportion equation
   55,018.72 : 82,528.16 = 19,958.40 : x
2. Step 2: Convert to fraction form
   55,018.72/82,528.16 = 19,958.40/x
3. Step 3: Cross multiply
   55,018.72x = 82,528.16 × 19,958.40
4. Step 4: Simplify right side
   55,018.72x = 1,647,130,028.54
5. Step 5: Solve for x
   x = 1,647,130,028.54/55,018.72
6. Step 6: Final answer
   x = 29,937.63