Finding the Fourth Proportional to 31,012.23, 42,796.95 and 16,865.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.23 : 42,796.95 = 16,865.10 : x
2. Step 2: Convert to fraction form
   31,012.23/42,796.95 = 16,865.10/x
3. Step 3: Cross multiply
   31,012.23x = 42,796.95 × 16,865.10
4. Step 4: Simplify right side
   31,012.23x = 721,774,841.45
5. Step 5: Solve for x
   x = 721,774,841.45/31,012.23
6. Step 6: Final answer
   x = 23,273.88