Finding the Fourth Proportional to 23,480.79, 32,404.28 and 12,870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   23,480.79 : 32,404.28 = 12,870.42 : x
2. Step 2: Convert to fraction form
   23,480.79/32,404.28 = 12,870.42/x
3. Step 3: Cross multiply
   23,480.79x = 32,404.28 × 12,870.42
4. Step 4: Simplify right side
   23,480.79x = 417,056,629.05
5. Step 5: Solve for x
   x = 417,056,629.05/23,480.79
6. Step 6: Final answer
   x = 17,761.61