Finding the Fourth Proportional to 23,521.28, 32,460.12 and 12,911.60

Step by Step Solution

1. Step 1: Write the proportion equation
   23,521.28 : 32,460.12 = 12,911.60 : x
2. Step 2: Convert to fraction form
   23,521.28/32,460.12 = 12,911.60/x
3. Step 3: Cross multiply
   23,521.28x = 32,460.12 × 12,911.60
4. Step 4: Simplify right side
   23,521.28x = 419,112,085.39
5. Step 5: Solve for x
   x = 419,112,085.39/23,521.28
6. Step 6: Final answer
   x = 17,818.42