Finding the Fourth Proportional to 9,131.16, 12,600.96 and 4,939.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.16 : 12,600.96 = 4,939.40 : x
2. Step 2: Convert to fraction form
   9,131.16/12,600.96 = 4,939.40/x
3. Step 3: Cross multiply
   9,131.16x = 12,600.96 × 4,939.40
4. Step 4: Simplify right side
   9,131.16x = 62,241,181.82
5. Step 5: Solve for x
   x = 62,241,181.82/9,131.16
6. Step 6: Final answer
   x = 6,816.35