Finding the Fourth Proportional to 28,215.01, 42,309.25 and 10,433.39

Step by Step Solution

1. Step 1: Write the proportion equation
   28,215.01 : 42,309.25 = 10,433.39 : x
2. Step 2: Convert to fraction form
   28,215.01/42,309.25 = 10,433.39/x
3. Step 3: Cross multiply
   28,215.01x = 42,309.25 × 10,433.39
4. Step 4: Simplify right side
   28,215.01x = 441,428,905.86
5. Step 5: Solve for x
   x = 441,428,905.86/28,215.01
6. Step 6: Final answer
   x = 15,645.18