Finding the Fourth Proportional to 13,479.18, 18,600.68 and 7,511.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,479.18 : 18,600.68 = 7,511.50 : x
2. Step 2: Convert to fraction form
   13,479.18/18,600.68 = 7,511.50/x
3. Step 3: Cross multiply
   13,479.18x = 18,600.68 × 7,511.50
4. Step 4: Simplify right side
   13,479.18x = 139,719,007.82
5. Step 5: Solve for x
   x = 139,719,007.82/13,479.18
6. Step 6: Final answer
   x = 10,365.54