Finding the Fourth Proportional to 28,443.31, 42,670.04 and 9,725.43

Step by Step Solution

1. Step 1: Write the proportion equation
   28,443.31 : 42,670.04 = 9,725.43 : x
2. Step 2: Convert to fraction form
   28,443.31/42,670.04 = 9,725.43/x
3. Step 3: Cross multiply
   28,443.31x = 42,670.04 × 9,725.43
4. Step 4: Simplify right side
   28,443.31x = 414,984,487.12
5. Step 5: Solve for x
   x = 414,984,487.12/28,443.31
6. Step 6: Final answer
   x = 14,589.88