Finding the Fourth Proportional to 8,632.91, 12,939.56 and 7,590.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,632.91 : 12,939.56 = 7,590.89 : x
2. Step 2: Convert to fraction form
   8,632.91/12,939.56 = 7,590.89/x
3. Step 3: Cross multiply
   8,632.91x = 12,939.56 × 7,590.89
4. Step 4: Simplify right side
   8,632.91x = 98,222,776.61
5. Step 5: Solve for x
   x = 98,222,776.61/8,632.91
6. Step 6: Final answer
   x = 11,377.71