Finding the Fourth Proportional to 31,117.83, 42,942.90 and 16,970.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,117.83 : 42,942.90 = 16,970.68 : x
2. Step 2: Convert to fraction form
   31,117.83/42,942.90 = 16,970.68/x
3. Step 3: Cross multiply
   31,117.83x = 42,942.90 × 16,970.68
4. Step 4: Simplify right side
   31,117.83x = 728,770,214.17
5. Step 5: Solve for x
   x = 728,770,214.17/31,117.83
6. Step 6: Final answer
   x = 23,419.70