Finding the Fourth Proportional to 23,481.78, 32,405.31 and 12,870.78

Step by Step Solution

1. Step 1: Write the proportion equation
   23,481.78 : 32,405.31 = 12,870.78 : x
2. Step 2: Convert to fraction form
   23,481.78/32,405.31 = 12,870.78/x
3. Step 3: Cross multiply
   23,481.78x = 32,405.31 × 12,870.78
4. Step 4: Simplify right side
   23,481.78x = 417,081,615.84
5. Step 5: Solve for x
   x = 417,081,615.84/23,481.78
6. Step 6: Final answer
   x = 17,761.93