Finding the Fourth Proportional to 17,980.32, 26,928.72 and 17,357.40

Step by Step Solution

1. Step 1: Write the proportion equation
   17,980.32 : 26,928.72 = 17,357.40 : x
2. Step 2: Convert to fraction form
   17,980.32/26,928.72 = 17,357.40/x
3. Step 3: Cross multiply
   17,980.32x = 26,928.72 × 17,357.40
4. Step 4: Simplify right side
   17,980.32x = 467,412,564.53
5. Step 5: Solve for x
   x = 467,412,564.53/17,980.32
6. Step 6: Final answer
   x = 25,995.79