Finding the Fourth Proportional to 12,385.32, 17,099.52 and 8,607.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,385.32 : 17,099.52 = 8,607.28 : x
2. Step 2: Convert to fraction form
   12,385.32/17,099.52 = 8,607.28/x
3. Step 3: Cross multiply
   12,385.32x = 17,099.52 × 8,607.28
4. Step 4: Simplify right side
   12,385.32x = 147,180,356.51
5. Step 5: Solve for x
   x = 147,180,356.51/12,385.32
6. Step 6: Final answer
   x = 11,883.45