Finding the Fourth Proportional to 12,598.18, 18,871.35 and 7,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,598.18 : 18,871.35 = 7,391.50 : x
2. Step 2: Convert to fraction form
   12,598.18/18,871.35 = 7,391.50/x
3. Step 3: Cross multiply
   12,598.18x = 18,871.35 × 7,391.50
4. Step 4: Simplify right side
   12,598.18x = 139,487,583.53
5. Step 5: Solve for x
   x = 139,487,583.53/12,598.18
6. Step 6: Final answer
   x = 11,072.04