Finding the Fourth Proportional to 28,299.42, 42,458.34 and 13,506.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,299.42 : 42,458.34 = 13,506.42 : x
2. Step 2: Convert to fraction form
   28,299.42/42,458.34 = 13,506.42/x
3. Step 3: Cross multiply
   28,299.42x = 42,458.34 × 13,506.42
4. Step 4: Simplify right side
   28,299.42x = 573,460,172.54
5. Step 5: Solve for x
   x = 573,460,172.54/28,299.42
6. Step 6: Final answer
   x = 20,264.03