Finding the Fourth Proportional to 28,429.73, 42,650.06 and 8,708.45

Step by Step Solution

1. Step 1: Write the proportion equation
   28,429.73 : 42,650.06 = 8,708.45 : x
2. Step 2: Convert to fraction form
   28,429.73/42,650.06 = 8,708.45/x
3. Step 3: Cross multiply
   28,429.73x = 42,650.06 × 8,708.45
4. Step 4: Simplify right side
   28,429.73x = 371,415,978.09
5. Step 5: Solve for x
   x = 371,415,978.09/28,429.73
6. Step 6: Final answer
   x = 13,064.35