Finding the Fourth Proportional to 31,103.82, 42,921.99 and 17,491.47

Step by Step Solution

1. Step 1: Write the proportion equation
   31,103.82 : 42,921.99 = 17,491.47 : x
2. Step 2: Convert to fraction form
   31,103.82/42,921.99 = 17,491.47/x
3. Step 3: Cross multiply
   31,103.82x = 42,921.99 × 17,491.47
4. Step 4: Simplify right side
   31,103.82x = 750,768,700.43
5. Step 5: Solve for x
   x = 750,768,700.43/31,103.82
6. Step 6: Final answer
   x = 24,137.51