Finding the Fourth Proportional to 12,992.78, 19,485.93 and 5,096.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992.78 : 19,485.93 = 5,096.90 : x
2. Step 2: Convert to fraction form
   12,992.78/19,485.93 = 5,096.90/x
3. Step 3: Cross multiply
   12,992.78x = 19,485.93 × 5,096.90
4. Step 4: Simplify right side
   12,992.78x = 99,317,836.62
5. Step 5: Solve for x
   x = 99,317,836.62/12,992.78
6. Step 6: Final answer
   x = 7,644.08