Finding the Fourth Proportional to 30,554.28, 42,164.52 and 17,128.86

Step by Step Solution

1. Step 1: Write the proportion equation
   30,554.28 : 42,164.52 = 17,128.86 : x
2. Step 2: Convert to fraction form
   30,554.28/42,164.52 = 17,128.86/x
3. Step 3: Cross multiply
   30,554.28x = 42,164.52 × 17,128.86
4. Step 4: Simplify right side
   30,554.28x = 722,230,160.05
5. Step 5: Solve for x
   x = 722,230,160.05/30,554.28
6. Step 6: Final answer
   x = 23,637.61