Finding the Fourth Proportional to 30,567.60, 42,185.32 and 17,139.74

Step by Step Solution

1. Step 1: Write the proportion equation
   30,567.60 : 42,185.32 = 17,139.74 : x
2. Step 2: Convert to fraction form
   30,567.60/42,185.32 = 17,139.74/x
3. Step 3: Cross multiply
   30,567.60x = 42,185.32 × 17,139.74
4. Step 4: Simplify right side
   30,567.60x = 723,045,416.62
5. Step 5: Solve for x
   x = 723,045,416.62/30,567.60
6. Step 6: Final answer
   x = 23,653.98