Finding the Fourth Proportional to 23,601.72, 32,570.13 and 12,991.13

Step by Step Solution

1. Step 1: Write the proportion equation
   23,601.72 : 32,570.13 = 12,991.13 : x
2. Step 2: Convert to fraction form
   23,601.72/32,570.13 = 12,991.13/x
3. Step 3: Cross multiply
   23,601.72x = 32,570.13 × 12,991.13
4. Step 4: Simplify right side
   23,601.72x = 423,122,792.95
5. Step 5: Solve for x
   x = 423,122,792.95/23,601.72
6. Step 6: Final answer
   x = 17,927.63