Finding the Fourth Proportional to 30,900.69, 42,645.13 and 17,472.07

Step by Step Solution

1. Step 1: Write the proportion equation
   30,900.69 : 42,645.13 = 17,472.07 : x
2. Step 2: Convert to fraction form
   30,900.69/42,645.13 = 17,472.07/x
3. Step 3: Cross multiply
   30,900.69x = 42,645.13 × 17,472.07
4. Step 4: Simplify right side
   30,900.69x = 745,098,696.52
5. Step 5: Solve for x
   x = 745,098,696.52/30,900.69
6. Step 6: Final answer
   x = 24,112.69