Finding the Fourth Proportional to 13,012.57, 17,957.34 and 7,423.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,012.57 : 17,957.34 = 7,423.57 : x
2. Step 2: Convert to fraction form
   13,012.57/17,957.34 = 7,423.57/x
3. Step 3: Cross multiply
   13,012.57x = 17,957.34 × 7,423.57
4. Step 4: Simplify right side
   13,012.57x = 133,307,570.50
5. Step 5: Solve for x
   x = 133,307,570.50/13,012.57
6. Step 6: Final answer
   x = 10,244.52