Finding the Fourth Proportional to 20,499.32, 28,284.54 and 13,043

Step by Step Solution

1. Step 1: Write the proportion equation
   20,499.32 : 28,284.54 = 13,043 : x
2. Step 2: Convert to fraction form
   20,499.32/28,284.54 = 13,043/x
3. Step 3: Cross multiply
   20,499.32x = 28,284.54 × 13,043
4. Step 4: Simplify right side
   20,499.32x = 368,915,255.22
5. Step 5: Solve for x
   x = 368,915,255.22/20,499.32
6. Step 6: Final answer
   x = 17,996.46