Finding the Fourth Proportional to 23,601.15, 32,569.82 and 12,991

Step by Step Solution

1. Step 1: Write the proportion equation
   23,601.15 : 32,569.82 = 12,991 : x
2. Step 2: Convert to fraction form
   23,601.15/32,569.82 = 12,991/x
3. Step 3: Cross multiply
   23,601.15x = 32,569.82 × 12,991
4. Step 4: Simplify right side
   23,601.15x = 423,114,531.62
5. Step 5: Solve for x
   x = 423,114,531.62/23,601.15
6. Step 6: Final answer
   x = 17,927.71