Finding the Fourth Proportional to 31,085.21, 42,896.13 and 17,654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.21 : 42,896.13 = 17,654.72 : x
2. Step 2: Convert to fraction form
   31,085.21/42,896.13 = 17,654.72/x
3. Step 3: Cross multiply
   31,085.21x = 42,896.13 × 17,654.72
4. Step 4: Simplify right side
   31,085.21x = 757,319,164.23
5. Step 5: Solve for x
   x = 757,319,164.23/31,085.21
6. Step 6: Final answer
   x = 24,362.68