Finding the Fourth Proportional to 22,449.98, 30,978.78 and 13,017.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,449.98 : 30,978.78 = 13,017.50 : x
2. Step 2: Convert to fraction form
   22,449.98/30,978.78 = 13,017.50/x
3. Step 3: Cross multiply
   22,449.98x = 30,978.78 × 13,017.50
4. Step 4: Simplify right side
   22,449.98x = 403,266,268.65
5. Step 5: Solve for x
   x = 403,266,268.65/22,449.98
6. Step 6: Final answer
   x = 17,962.88