Finding the Fourth Proportional to 12,815.42, 17,692.55 and 8,336.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,815.42 : 17,692.55 = 8,336.93 : x
2. Step 2: Convert to fraction form
   12,815.42/17,692.55 = 8,336.93/x
3. Step 3: Cross multiply
   12,815.42x = 17,692.55 × 8,336.93
4. Step 4: Simplify right side
   12,815.42x = 147,501,595.10
5. Step 5: Solve for x
   x = 147,501,595.10/12,815.42
6. Step 6: Final answer
   x = 11,509.69