Finding the Fourth Proportional to 30,590.69, 42,212.67 and 17,160.08

Step by Step Solution

1. Step 1: Write the proportion equation
   30,590.69 : 42,212.67 = 17,160.08 : x
2. Step 2: Convert to fraction form
   30,590.69/42,212.67 = 17,160.08/x
3. Step 3: Cross multiply
   30,590.69x = 42,212.67 × 17,160.08
4. Step 4: Simplify right side
   30,590.69x = 724,372,794.21
5. Step 5: Solve for x
   x = 724,372,794.21/30,590.69
6. Step 6: Final answer
   x = 23,679.52