Finding the Fourth Proportional to 12,645.96, 18,978.62 and 5,725.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,645.96 : 18,978.62 = 5,725.32 : x
2. Step 2: Convert to fraction form
   12,645.96/18,978.62 = 5,725.32/x
3. Step 3: Cross multiply
   12,645.96x = 18,978.62 × 5,725.32
4. Step 4: Simplify right side
   12,645.96x = 108,658,672.66
5. Step 5: Solve for x
   x = 108,658,672.66/12,645.96
6. Step 6: Final answer
   x = 8,592.36