Finding the Fourth Proportional to 31,118.27, 42,943.43 and 16,970.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.27 : 42,943.43 = 16,970.81 : x
2. Step 2: Convert to fraction form
   31,118.27/42,943.43 = 16,970.81/x
3. Step 3: Cross multiply
   31,118.27x = 42,943.43 × 16,970.81
4. Step 4: Simplify right side
   31,118.27x = 728,784,618.99
5. Step 5: Solve for x
   x = 728,784,618.99/31,118.27
6. Step 6: Final answer
   x = 23,419.83