Finding the Fourth Proportional to 23,032.55, 31,785.53 and 12,961.34

Step by Step Solution

1. Step 1: Write the proportion equation
   23,032.55 : 31,785.53 = 12,961.34 : x
2. Step 2: Convert to fraction form
   23,032.55/31,785.53 = 12,961.34/x
3. Step 3: Cross multiply
   23,032.55x = 31,785.53 × 12,961.34
4. Step 4: Simplify right side
   23,032.55x = 411,982,837.68
5. Step 5: Solve for x
   x = 411,982,837.68/23,032.55
6. Step 6: Final answer
   x = 17,886.99