Finding the Fourth Proportional to 10,186.46, 15,279.72 and 2,791

Step by Step Solution

1. Step 1: Write the proportion equation
   10,186.46 : 15,279.72 = 2,791 : x
2. Step 2: Convert to fraction form
   10,186.46/15,279.72 = 2,791/x
3. Step 3: Cross multiply
   10,186.46x = 15,279.72 × 2,791
4. Step 4: Simplify right side
   10,186.46x = 42,645,698.52
5. Step 5: Solve for x
   x = 42,645,698.52/10,186.46
6. Step 6: Final answer
   x = 4,186.51