Finding the Fourth Proportional to 31,117.42, 42,941.61 and 16,970.26

Step by Step Solution

1. Step 1: Write the proportion equation
   31,117.42 : 42,941.61 = 16,970.26 : x
2. Step 2: Convert to fraction form
   31,117.42/42,941.61 = 16,970.26/x
3. Step 3: Cross multiply
   31,117.42x = 42,941.61 × 16,970.26
4. Step 4: Simplify right side
   31,117.42x = 728,730,286.52
5. Step 5: Solve for x
   x = 728,730,286.52/31,117.42
6. Step 6: Final answer
   x = 23,418.72