Finding the Fourth Proportional to 30,707.98, 42,370.65 and 17,958.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,707.98 : 42,370.65 = 17,958.69 : x
2. Step 2: Convert to fraction form
   30,707.98/42,370.65 = 17,958.69/x
3. Step 3: Cross multiply
   30,707.98x = 42,370.65 × 17,958.69
4. Step 4: Simplify right side
   30,707.98x = 760,921,368.45
5. Step 5: Solve for x
   x = 760,921,368.45/30,707.98
6. Step 6: Final answer
   x = 24,779.27