Finding the Fourth Proportional to 28,345.29, 42,453.12 and 13,564.59

Step by Step Solution

1. Step 1: Write the proportion equation
   28,345.29 : 42,453.12 = 13,564.59 : x
2. Step 2: Convert to fraction form
   28,345.29/42,453.12 = 13,564.59/x
3. Step 3: Cross multiply
   28,345.29x = 42,453.12 × 13,564.59
4. Step 4: Simplify right side
   28,345.29x = 575,858,954.76
5. Step 5: Solve for x
   x = 575,858,954.76/28,345.29
6. Step 6: Final answer
   x = 20,315.86