Finding the Fourth Proportional to 12,977.57, 17,908.61 and 7,387.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,977.57 : 17,908.61 = 7,387.49 : x
2. Step 2: Convert to fraction form
   12,977.57/17,908.61 = 7,387.49/x
3. Step 3: Cross multiply
   12,977.57x = 17,908.61 × 7,387.49
4. Step 4: Simplify right side
   12,977.57x = 132,299,640.35
5. Step 5: Solve for x
   x = 132,299,640.35/12,977.57
6. Step 6: Final answer
   x = 10,194.48