Finding the Fourth Proportional to 8,490.93, 12,739.38 and 3,300.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,490.93 : 12,739.38 = 3,300.45 : x
2. Step 2: Convert to fraction form
   8,490.93/12,739.38 = 3,300.45/x
3. Step 3: Cross multiply
   8,490.93x = 12,739.38 × 3,300.45
4. Step 4: Simplify right side
   8,490.93x = 42,045,686.72
5. Step 5: Solve for x
   x = 42,045,686.72/8,490.93
6. Step 6: Final answer
   x = 4,951.84