Finding the Fourth Proportional to 23,601.38, 32,569.90 and 12,991.01

Step by Step Solution

1. Step 1: Write the proportion equation
   23,601.38 : 32,569.90 = 12,991.01 : x
2. Step 2: Convert to fraction form
   23,601.38/32,569.90 = 12,991.01/x
3. Step 3: Cross multiply
   23,601.38x = 32,569.90 × 12,991.01
4. Step 4: Simplify right side
   23,601.38x = 423,115,792.87
5. Step 5: Solve for x
   x = 423,115,792.87/23,601.38
6. Step 6: Final answer
   x = 17,927.59