Finding the Fourth Proportional to 12,922.34, 19,383.57 and 5,131.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,922.34 : 19,383.57 = 5,131.15 : x
2. Step 2: Convert to fraction form
   12,922.34/19,383.57 = 5,131.15/x
3. Step 3: Cross multiply
   12,922.34x = 19,383.57 × 5,131.15
4. Step 4: Simplify right side
   12,922.34x = 99,459,956.75
5. Step 5: Solve for x
   x = 99,459,956.75/12,922.34
6. Step 6: Final answer
   x = 7,696.75