Finding the Fourth Proportional to 28,443.62, 42,670.50 and 9,725.74

Step by Step Solution

1. Step 1: Write the proportion equation
   28,443.62 : 42,670.50 = 9,725.74 : x
2. Step 2: Convert to fraction form
   28,443.62/42,670.50 = 9,725.74/x
3. Step 3: Cross multiply
   28,443.62x = 42,670.50 × 9,725.74
4. Step 4: Simplify right side
   28,443.62x = 415,002,045.52
5. Step 5: Solve for x
   x = 415,002,045.52/28,443.62
6. Step 6: Final answer
   x = 14,590.34