Finding the Fourth Proportional to 13,098.61, 18,074.71 and 7,431.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,098.61 : 18,074.71 = 7,431.56 : x
2. Step 2: Convert to fraction form
   13,098.61/18,074.71 = 7,431.56/x
3. Step 3: Cross multiply
   13,098.61x = 18,074.71 × 7,431.56
4. Step 4: Simplify right side
   13,098.61x = 134,323,291.85
5. Step 5: Solve for x
   x = 134,323,291.85/13,098.61
6. Step 6: Final answer
   x = 10,254.77