Finding the Fourth Proportional to 21,869.94, 30,182.72 and 13,375.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,869.94 : 30,182.72 = 13,375.88 : x
2. Step 2: Convert to fraction form
   21,869.94/30,182.72 = 13,375.88/x
3. Step 3: Cross multiply
   21,869.94x = 30,182.72 × 13,375.88
4. Step 4: Simplify right side
   21,869.94x = 403,720,336.19
5. Step 5: Solve for x
   x = 403,720,336.19/21,869.94
6. Step 6: Final answer
   x = 18,460.05