Finding the Fourth Proportional to 12,762.45, 17,604.36 and 8,978.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,762.45 : 17,604.36 = 8,978.94 : x
2. Step 2: Convert to fraction form
   12,762.45/17,604.36 = 8,978.94/x
3. Step 3: Cross multiply
   12,762.45x = 17,604.36 × 8,978.94
4. Step 4: Simplify right side
   12,762.45x = 158,068,492.18
5. Step 5: Solve for x
   x = 158,068,492.18/12,762.45
6. Step 6: Final answer
   x = 12,385.43