Finding the Fourth Proportional to 12,805.93, 17,693.88 and 9,213.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,805.93 : 17,693.88 = 9,213.78 : x
2. Step 2: Convert to fraction form
   12,805.93/17,693.88 = 9,213.78/x
3. Step 3: Cross multiply
   12,805.93x = 17,693.88 × 9,213.78
4. Step 4: Simplify right side
   12,805.93x = 163,027,556.56
5. Step 5: Solve for x
   x = 163,027,556.56/12,805.93
6. Step 6: Final answer
   x = 12,730.63