Finding the Fourth Proportional to 23,200.51, 32,016.25 and 13,128.77

Step by Step Solution

1. Step 1: Write the proportion equation
   23,200.51 : 32,016.25 = 13,128.77 : x
2. Step 2: Convert to fraction form
   23,200.51/32,016.25 = 13,128.77/x
3. Step 3: Cross multiply
   23,200.51x = 32,016.25 × 13,128.77
4. Step 4: Simplify right side
   23,200.51x = 420,333,982.51
5. Step 5: Solve for x
   x = 420,333,982.51/23,200.51
6. Step 6: Final answer
   x = 18,117.45