Finding the Fourth Proportional to 31,005.95, 42,783.46 and 18,259.67

Step by Step Solution

1. Step 1: Write the proportion equation
   31,005.95 : 42,783.46 = 18,259.67 : x
2. Step 2: Convert to fraction form
   31,005.95/42,783.46 = 18,259.67/x
3. Step 3: Cross multiply
   31,005.95x = 42,783.46 × 18,259.67
4. Step 4: Simplify right side
   31,005.95x = 781,211,861.06
5. Step 5: Solve for x
   x = 781,211,861.06/31,005.95
6. Step 6: Final answer
   x = 25,195.55