Finding the Fourth Proportional to 31,152.36, 42,990.84 and 17,005.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152.36 : 42,990.84 = 17,005.71 : x
2. Step 2: Convert to fraction form
   31,152.36/42,990.84 = 17,005.71/x
3. Step 3: Cross multiply
   31,152.36x = 42,990.84 × 17,005.71
4. Step 4: Simplify right side
   31,152.36x = 731,089,757.70
5. Step 5: Solve for x
   x = 731,089,757.70/31,152.36
6. Step 6: Final answer
   x = 23,468.20