Finding the Fourth Proportional to 30,881.50, 42,600.00 and 18,785.68

Step by Step Solution

1. Step 1: Write the proportion equation
   30,881.50 : 42,600.00 = 18,785.68 : x
2. Step 2: Convert to fraction form
   30,881.50/42,600.00 = 18,785.68/x
3. Step 3: Cross multiply
   30,881.50x = 42,600.00 × 18,785.68
4. Step 4: Simplify right side
   30,881.50x = 800,269,661.07
5. Step 5: Solve for x
   x = 800,269,661.07/30,881.50
6. Step 6: Final answer
   x = 25,914.21