Finding the Fourth Proportional to 23,156.60, 31,957.20 and 13,085.46

Step by Step Solution

1. Step 1: Write the proportion equation
   23,156.60 : 31,957.20 = 13,085.46 : x
2. Step 2: Convert to fraction form
   23,156.60/31,957.20 = 13,085.46/x
3. Step 3: Cross multiply
   23,156.60x = 31,957.20 × 13,085.46
4. Step 4: Simplify right side
   23,156.60x = 418,174,662.31
5. Step 5: Solve for x
   x = 418,174,662.31/23,156.60
6. Step 6: Final answer
   x = 18,058.56