Finding the Fourth Proportional to 31,756.69, 47,618.18 and 10,689.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,756.69 : 47,618.18 = 10,689.71 : x
2. Step 2: Convert to fraction form
   31,756.69/47,618.18 = 10,689.71/x
3. Step 3: Cross multiply
   31,756.69x = 47,618.18 × 10,689.71
4. Step 4: Simplify right side
   31,756.69x = 509,024,283.47
5. Step 5: Solve for x
   x = 509,024,283.47/31,756.69
6. Step 6: Final answer
   x = 16,028.88