Finding the Fourth Proportional to 12,929.76, 19,392.12 and 5,907.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,929.76 : 19,392.12 = 5,907.78 : x
2. Step 2: Convert to fraction form
   12,929.76/19,392.12 = 5,907.78/x
3. Step 3: Cross multiply
   12,929.76x = 19,392.12 × 5,907.78
4. Step 4: Simplify right side
   12,929.76x = 114,564,378.69
5. Step 5: Solve for x
   x = 114,564,378.69/12,929.76
6. Step 6: Final answer
   x = 8,860.52