Finding the Fourth Proportional to 30,567.70, 42,182.89 and 17,138.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,567.70 : 42,182.89 = 17,138.91 : x
2. Step 2: Convert to fraction form
   30,567.70/42,182.89 = 17,138.91/x
3. Step 3: Cross multiply
   30,567.70x = 42,182.89 × 17,138.91
4. Step 4: Simplify right side
   30,567.70x = 722,968,870.59
5. Step 5: Solve for x
   x = 722,968,870.59/30,567.70
6. Step 6: Final answer
   x = 23,651.40