Finding the Fourth Proportional to 23,603.32, 32,571.33 and 12,990.91

Step by Step Solution

1. Step 1: Write the proportion equation
   23,603.32 : 32,571.33 = 12,990.91 : x
2. Step 2: Convert to fraction form
   23,603.32/32,571.33 = 12,990.91/x
3. Step 3: Cross multiply
   23,603.32x = 32,571.33 × 12,990.91
4. Step 4: Simplify right side
   23,603.32x = 423,131,216.61
5. Step 5: Solve for x
   x = 423,131,216.61/23,603.32
6. Step 6: Final answer
   x = 17,926.77