Finding the Fourth Proportional to 31,118.13, 42,942.96 and 16,970.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.13 : 42,942.96 = 16,970.94 : x
2. Step 2: Convert to fraction form
   31,118.13/42,942.96 = 16,970.94/x
3. Step 3: Cross multiply
   31,118.13x = 42,942.96 × 16,970.94
4. Step 4: Simplify right side
   31,118.13x = 728,782,397.58
5. Step 5: Solve for x
   x = 728,782,397.58/31,118.13
6. Step 6: Final answer
   x = 23,419.86