Finding the Fourth Proportional to 30,558.66, 42,173.55 and 17,642.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,558.66 : 42,173.55 = 17,642.10 : x
2. Step 2: Convert to fraction form
   30,558.66/42,173.55 = 17,642.10/x
3. Step 3: Cross multiply
   30,558.66x = 42,173.55 × 17,642.10
4. Step 4: Simplify right side
   30,558.66x = 744,029,986.46
5. Step 5: Solve for x
   x = 744,029,986.46/30,558.66
6. Step 6: Final answer
   x = 24,347.60