Finding the Fourth Proportional to 55,987.56, 83,961.18 and 18,540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,987.56 : 83,961.18 = 18,540.72 : x
2. Step 2: Convert to fraction form
   55,987.56/83,961.18 = 18,540.72/x
3. Step 3: Cross multiply
   55,987.56x = 83,961.18 × 18,540.72
4. Step 4: Simplify right side
   55,987.56x = 1,556,700,729.25
5. Step 5: Solve for x
   x = 1,556,700,729.25/55,987.56
6. Step 6: Final answer
   x = 27,804.40