Finding the Fourth Proportional to 13,457.10, 18,570.55 and 7,488.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,457.10 : 18,570.55 = 7,488.71 : x
2. Step 2: Convert to fraction form
   13,457.10/18,570.55 = 7,488.71/x
3. Step 3: Cross multiply
   13,457.10x = 18,570.55 × 7,488.71
4. Step 4: Simplify right side
   13,457.10x = 139,069,491.20
5. Step 5: Solve for x
   x = 139,069,491.20/13,457.10
6. Step 6: Final answer
   x = 10,334.28