Finding the Fourth Proportional to 12,256.56, 16,931.28 and 10,929.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,256.56 : 16,931.28 = 10,929.84 : x
2. Step 2: Convert to fraction form
   12,256.56/16,931.28 = 10,929.84/x
3. Step 3: Cross multiply
   12,256.56x = 16,931.28 × 10,929.84
4. Step 4: Simplify right side
   12,256.56x = 185,056,181.40
5. Step 5: Solve for x
   x = 185,056,181.40/12,256.56
6. Step 6: Final answer
   x = 15,098.54