Finding the Fourth Proportional to 12,948.89, 19,424.61 and 5,155.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,948.89 : 19,424.61 = 5,155.88 : x
2. Step 2: Convert to fraction form
   12,948.89/19,424.61 = 5,155.88/x
3. Step 3: Cross multiply
   12,948.89x = 19,424.61 × 5,155.88
4. Step 4: Simplify right side
   12,948.89x = 100,150,861.08
5. Step 5: Solve for x
   x = 100,150,861.08/12,948.89
6. Step 6: Final answer
   x = 7,734.32