Finding the Fourth Proportional to 12,948.54, 19,422.78 and 5,155.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,948.54 : 19,422.78 = 5,155.50 : x
2. Step 2: Convert to fraction form
   12,948.54/19,422.78 = 5,155.50/x
3. Step 3: Cross multiply
   12,948.54x = 19,422.78 × 5,155.50
4. Step 4: Simplify right side
   12,948.54x = 100,134,142.29
5. Step 5: Solve for x
   x = 100,134,142.29/12,948.54
6. Step 6: Final answer
   x = 7,733.24