Finding the Fourth Proportional to 23,198.59, 32,012.29 and 13,638.86

Step by Step Solution

1. Step 1: Write the proportion equation
   23,198.59 : 32,012.29 = 13,638.86 : x
2. Step 2: Convert to fraction form
   23,198.59/32,012.29 = 13,638.86/x
3. Step 3: Cross multiply
   23,198.59x = 32,012.29 × 13,638.86
4. Step 4: Simplify right side
   23,198.59x = 436,611,260.33
5. Step 5: Solve for x
   x = 436,611,260.33/23,198.59
6. Step 6: Final answer
   x = 18,820.60