Finding the Fourth Proportional to 28,003.27, 42,014.64 and 18,680.71

Step by Step Solution

1. Step 1: Write the proportion equation
   28,003.27 : 42,014.64 = 18,680.71 : x
2. Step 2: Convert to fraction form
   28,003.27/42,014.64 = 18,680.71/x
3. Step 3: Cross multiply
   28,003.27x = 42,014.64 × 18,680.71
4. Step 4: Simplify right side
   28,003.27x = 784,863,305.59
5. Step 5: Solve for x
   x = 784,863,305.59/28,003.27
6. Step 6: Final answer
   x = 28,027.56