Finding the Fourth Proportional to 12,354.73, 17,056.88 and 7,645.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,354.73 : 17,056.88 = 7,645.39 : x
2. Step 2: Convert to fraction form
   12,354.73/17,056.88 = 7,645.39/x
3. Step 3: Cross multiply
   12,354.73x = 17,056.88 × 7,645.39
4. Step 4: Simplify right side
   12,354.73x = 130,406,447.58
5. Step 5: Solve for x
   x = 130,406,447.58/12,354.73
6. Step 6: Final answer
   x = 10,555.19