Finding the Fourth Proportional to 31,106.88, 42,926.72 and 16,960

Step by Step Solution

1. Step 1: Write the proportion equation
   31,106.88 : 42,926.72 = 16,960 : x
2. Step 2: Convert to fraction form
   31,106.88/42,926.72 = 16,960/x
3. Step 3: Cross multiply
   31,106.88x = 42,926.72 × 16,960
4. Step 4: Simplify right side
   31,106.88x = 728,037,171.20
5. Step 5: Solve for x
   x = 728,037,171.20/31,106.88
6. Step 6: Final answer
   x = 23,404.38