Finding the Fourth Proportional to 9,012.88, 12,437.71 and 4,979.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,012.88 : 12,437.71 = 4,979.96 : x
2. Step 2: Convert to fraction form
   9,012.88/12,437.71 = 4,979.96/x
3. Step 3: Cross multiply
   9,012.88x = 12,437.71 × 4,979.96
4. Step 4: Simplify right side
   9,012.88x = 61,939,223.65
5. Step 5: Solve for x
   x = 61,939,223.65/9,012.88
6. Step 6: Final answer
   x = 6,872.30