Finding the Fourth Proportional to 9,187.63, 12,678.86 and 4,995.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,187.63 : 12,678.86 = 4,995.88 : x
2. Step 2: Convert to fraction form
   9,187.63/12,678.86 = 4,995.88/x
3. Step 3: Cross multiply
   9,187.63x = 12,678.86 × 4,995.88
4. Step 4: Simplify right side
   9,187.63x = 63,342,043.89
5. Step 5: Solve for x
   x = 63,342,043.89/9,187.63
6. Step 6: Final answer
   x = 6,894.28