Finding the Fourth Proportional to 31,368.78, 43,288.98 and 17,028.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,368.78 : 43,288.98 = 17,028.60 : x
2. Step 2: Convert to fraction form
   31,368.78/43,288.98 = 17,028.60/x
3. Step 3: Cross multiply
   31,368.78x = 43,288.98 × 17,028.60
4. Step 4: Simplify right side
   31,368.78x = 737,150,724.83
5. Step 5: Solve for x
   x = 737,150,724.83/31,368.78
6. Step 6: Final answer
   x = 23,499.50