Finding the Fourth Proportional to 10,590.78, 14,612.31 and 8,345.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,590.78 : 14,612.31 = 8,345.69 : x
2. Step 2: Convert to fraction form
   10,590.78/14,612.31 = 8,345.69/x
3. Step 3: Cross multiply
   10,590.78x = 14,612.31 × 8,345.69
4. Step 4: Simplify right side
   10,590.78x = 121,949,736.38
5. Step 5: Solve for x
   x = 121,949,736.38/10,590.78
6. Step 6: Final answer
   x = 11,514.71