Finding the Fourth Proportional to 28,314.81, 42,469.16 and 13,317.48

Step by Step Solution

1. Step 1: Write the proportion equation
   28,314.81 : 42,469.16 = 13,317.48 : x
2. Step 2: Convert to fraction form
   28,314.81/42,469.16 = 13,317.48/x
3. Step 3: Cross multiply
   28,314.81x = 42,469.16 × 13,317.48
4. Step 4: Simplify right side
   28,314.81x = 565,582,122.33
5. Step 5: Solve for x
   x = 565,582,122.33/28,314.81
6. Step 6: Final answer
   x = 19,974.78