Finding the Fourth Proportional to 9,176.82, 12,663.90 and 4,985.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,176.82 : 12,663.90 = 4,985.10 : x
2. Step 2: Convert to fraction form
   9,176.82/12,663.90 = 4,985.10/x
3. Step 3: Cross multiply
   9,176.82x = 12,663.90 × 4,985.10
4. Step 4: Simplify right side
   9,176.82x = 63,130,807.89
5. Step 5: Solve for x
   x = 63,130,807.89/9,176.82
6. Step 6: Final answer
   x = 6,879.38