Finding the Fourth Proportional to 23,100.80, 31,878.94 and 13,029.32

Step by Step Solution

1. Step 1: Write the proportion equation
   23,100.80 : 31,878.94 = 13,029.32 : x
2. Step 2: Convert to fraction form
   23,100.80/31,878.94 = 13,029.32/x
3. Step 3: Cross multiply
   23,100.80x = 31,878.94 × 13,029.32
4. Step 4: Simplify right side
   23,100.80x = 415,360,884.23
5. Step 5: Solve for x
   x = 415,360,884.23/23,100.80
6. Step 6: Final answer
   x = 17,980.37