Finding the Fourth Proportional to 23,431.38, 32,335.42 and 12,820.98

Step by Step Solution

1. Step 1: Write the proportion equation
   23,431.38 : 32,335.42 = 12,820.98 : x
2. Step 2: Convert to fraction form
   23,431.38/32,335.42 = 12,820.98/x
3. Step 3: Cross multiply
   23,431.38x = 32,335.42 × 12,820.98
4. Step 4: Simplify right side
   23,431.38x = 414,571,773.11
5. Step 5: Solve for x
   x = 414,571,773.11/23,431.38
6. Step 6: Final answer
   x = 17,693.02