Finding the Fourth Proportional to 12,888.54, 17,792.79 and 7,923.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,888.54 : 17,792.79 = 7,923.42 : x
2. Step 2: Convert to fraction form
   12,888.54/17,792.79 = 7,923.42/x
3. Step 3: Cross multiply
   12,888.54x = 17,792.79 × 7,923.42
4. Step 4: Simplify right side
   12,888.54x = 140,979,748.14
5. Step 5: Solve for x
   x = 140,979,748.14/12,888.54
6. Step 6: Final answer
   x = 10,938.38