Finding the Fourth Proportional to 6,185.98, 8,530.86 and 4,931.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,185.98 : 8,530.86 = 4,931.20 : x
2. Step 2: Convert to fraction form
   6,185.98/8,530.86 = 4,931.20/x
3. Step 3: Cross multiply
   6,185.98x = 8,530.86 × 4,931.20
4. Step 4: Simplify right side
   6,185.98x = 42,067,376.83
5. Step 5: Solve for x
   x = 42,067,376.83/6,185.98
6. Step 6: Final answer
   x = 6,800.44