Finding the Fourth Proportional to 12,002.79, 17,996.48 and 4,987.65

Step by Step Solution

1. Step 1: Write the proportion equation
   12,002.79 : 17,996.48 = 4,987.65 : x
2. Step 2: Convert to fraction form
   12,002.79/17,996.48 = 4,987.65/x
3. Step 3: Cross multiply
   12,002.79x = 17,996.48 × 4,987.65
4. Step 4: Simplify right side
   12,002.79x = 89,760,028.55
5. Step 5: Solve for x
   x = 89,760,028.55/12,002.79
6. Step 6: Final answer
   x = 7,478.27