Finding the Fourth Proportional to 16,780.32, 25,153.56 and 8,435.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,780.32 : 25,153.56 = 8,435.16 : x
2. Step 2: Convert to fraction form
   16,780.32/25,153.56 = 8,435.16/x
3. Step 3: Cross multiply
   16,780.32x = 25,153.56 × 8,435.16
4. Step 4: Simplify right side
   16,780.32x = 212,174,303.17
5. Step 5: Solve for x
   x = 212,174,303.17/16,780.32
6. Step 6: Final answer
   x = 12,644.23