Finding the Fourth Proportional to 28,387.39, 42,587.68 and 9,667.59

Step by Step Solution

1. Step 1: Write the proportion equation
   28,387.39 : 42,587.68 = 9,667.59 : x
2. Step 2: Convert to fraction form
   28,387.39/42,587.68 = 9,667.59/x
3. Step 3: Cross multiply
   28,387.39x = 42,587.68 × 9,667.59
4. Step 4: Simplify right side
   28,387.39x = 411,720,295.89
5. Step 5: Solve for x
   x = 411,720,295.89/28,387.39
6. Step 6: Final answer
   x = 14,503.63