Finding the Fourth Proportional to 30,899.69, 42,643.75 and 17,471.07

Step by Step Solution

1. Step 1: Write the proportion equation
   30,899.69 : 42,643.75 = 17,471.07 : x
2. Step 2: Convert to fraction form
   30,899.69/42,643.75 = 17,471.07/x
3. Step 3: Cross multiply
   30,899.69x = 42,643.75 × 17,471.07
4. Step 4: Simplify right side
   30,899.69x = 745,031,941.31
5. Step 5: Solve for x
   x = 745,031,941.31/30,899.69
6. Step 6: Final answer
   x = 24,111.31