Finding the Fourth Proportional to 12,389.15, 17,100.92 and 7,924.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,389.15 : 17,100.92 = 7,924.84 : x
2. Step 2: Convert to fraction form
   12,389.15/17,100.92 = 7,924.84/x
3. Step 3: Cross multiply
   12,389.15x = 17,100.92 × 7,924.84
4. Step 4: Simplify right side
   12,389.15x = 135,522,031.91
5. Step 5: Solve for x
   x = 135,522,031.91/12,389.15
6. Step 6: Final answer
   x = 10,938.77