Finding the Fourth Proportional to 39,719.42, 59,589.15 and 18,655.57

Step by Step Solution

1. Step 1: Write the proportion equation
   39,719.42 : 59,589.15 = 18,655.57 : x
2. Step 2: Convert to fraction form
   39,719.42/59,589.15 = 18,655.57/x
3. Step 3: Cross multiply
   39,719.42x = 59,589.15 × 18,655.57
4. Step 4: Simplify right side
   39,719.42x = 1,111,669,559.07
5. Step 5: Solve for x
   x = 1,111,669,559.07/39,719.42
6. Step 6: Final answer
   x = 27,988.06