Finding the Fourth Proportional to 12,939.39, 17,847.06 and 7,630.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,939.39 : 17,847.06 = 7,630.45 : x
2. Step 2: Convert to fraction form
   12,939.39/17,847.06 = 7,630.45/x
3. Step 3: Cross multiply
   12,939.39x = 17,847.06 × 7,630.45
4. Step 4: Simplify right side
   12,939.39x = 136,181,098.98
5. Step 5: Solve for x
   x = 136,181,098.98/12,939.39
6. Step 6: Final answer
   x = 10,524.54