Finding the Fourth Proportional to 12,386.37, 18,591.30 and 7,692.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,386.37 : 18,591.30 = 7,692.15 : x
2. Step 2: Convert to fraction form
   12,386.37/18,591.30 = 7,692.15/x
3. Step 3: Cross multiply
   12,386.37x = 18,591.30 × 7,692.15
4. Step 4: Simplify right side
   12,386.37x = 143,007,068.30
5. Step 5: Solve for x
   x = 143,007,068.30/12,386.37
6. Step 6: Final answer
   x = 11,545.52