Finding the Fourth Proportional to 12,981.44, 19,462.56 and 5,184.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981.44 : 19,462.56 = 5,184.32 : x
2. Step 2: Convert to fraction form
   12,981.44/19,462.56 = 5,184.32/x
3. Step 3: Cross multiply
   12,981.44x = 19,462.56 × 5,184.32
4. Step 4: Simplify right side
   12,981.44x = 100,900,139.06
5. Step 5: Solve for x
   x = 100,900,139.06/12,981.44
6. Step 6: Final answer
   x = 7,772.65