Finding the Fourth Proportional to 23,630.86, 32,610.58 and 13,020.40

Step by Step Solution

1. Step 1: Write the proportion equation
   23,630.86 : 32,610.58 = 13,020.40 : x
2. Step 2: Convert to fraction form
   23,630.86/32,610.58 = 13,020.40/x
3. Step 3: Cross multiply
   23,630.86x = 32,610.58 × 13,020.40
4. Step 4: Simplify right side
   23,630.86x = 424,602,632.78
5. Step 5: Solve for x
   x = 424,602,632.78/23,630.86
6. Step 6: Final answer
   x = 17,968.15