Finding the Fourth Proportional to 28,490.82, 42,723.81 and 8,758.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,490.82 : 42,723.81 = 8,758.50 : x
2. Step 2: Convert to fraction form
   28,490.82/42,723.81 = 8,758.50/x
3. Step 3: Cross multiply
   28,490.82x = 42,723.81 × 8,758.50
4. Step 4: Simplify right side
   28,490.82x = 374,196,489.89
5. Step 5: Solve for x
   x = 374,196,489.89/28,490.82
6. Step 6: Final answer
   x = 13,133.93