Finding the Fourth Proportional to 12,152.28, 16,777.88 and 9,919.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,152.28 : 16,777.88 = 9,919.46 : x
2. Step 2: Convert to fraction form
   12,152.28/16,777.88 = 9,919.46/x
3. Step 3: Cross multiply
   12,152.28x = 16,777.88 × 9,919.46
4. Step 4: Simplify right side
   12,152.28x = 166,427,594.89
5. Step 5: Solve for x
   x = 166,427,594.89/12,152.28
6. Step 6: Final answer
   x = 13,695.18