Finding the Fourth Proportional to 12,976.74, 17,907.63 and 7,311.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,976.74 : 17,907.63 = 7,311.48 : x
2. Step 2: Convert to fraction form
   12,976.74/17,907.63 = 7,311.48/x
3. Step 3: Cross multiply
   12,976.74x = 17,907.63 × 7,311.48
4. Step 4: Simplify right side
   12,976.74x = 130,931,278.59
5. Step 5: Solve for x
   x = 130,931,278.59/12,976.74
6. Step 6: Final answer
   x = 10,089.69