Finding the Fourth Proportional to 13,456.76, 18,570.02 and 7,488.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,456.76 : 18,570.02 = 7,488.30 : x
2. Step 2: Convert to fraction form
   13,456.76/18,570.02 = 7,488.30/x
3. Step 3: Cross multiply
   13,456.76x = 18,570.02 × 7,488.30
4. Step 4: Simplify right side
   13,456.76x = 139,057,880.77
5. Step 5: Solve for x
   x = 139,057,880.77/13,456.76
6. Step 6: Final answer
   x = 10,333.68