Finding the Fourth Proportional to 31,012.26, 42,796.80 and 16,865.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.26 : 42,796.80 = 16,865.34 : x
2. Step 2: Convert to fraction form
   31,012.26/42,796.80 = 16,865.34/x
3. Step 3: Cross multiply
   31,012.26x = 42,796.80 × 16,865.34
4. Step 4: Simplify right side
   31,012.26x = 721,782,582.91
5. Step 5: Solve for x
   x = 721,782,582.91/31,012.26
6. Step 6: Final answer
   x = 23,274.10