Finding the Fourth Proportional to 12,360.76, 17,046.42 and 10,939.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,360.76 : 17,046.42 = 10,939.18 : x
2. Step 2: Convert to fraction form
   12,360.76/17,046.42 = 10,939.18/x
3. Step 3: Cross multiply
   12,360.76x = 17,046.42 × 10,939.18
4. Step 4: Simplify right side
   12,360.76x = 186,473,856.74
5. Step 5: Solve for x
   x = 186,473,856.74/12,360.76
6. Step 6: Final answer
   x = 15,085.95