Finding the Fourth Proportional to 28,451.24, 42,681.47 and 10,683.30

Step by Step Solution

1. Step 1: Write the proportion equation
   28,451.24 : 42,681.47 = 10,683.30 : x
2. Step 2: Convert to fraction form
   28,451.24/42,681.47 = 10,683.30/x
3. Step 3: Cross multiply
   28,451.24x = 42,681.47 × 10,683.30
4. Step 4: Simplify right side
   28,451.24x = 455,978,948.45
5. Step 5: Solve for x
   x = 455,978,948.45/28,451.24
6. Step 6: Final answer
   x = 16,026.68