Finding the Fourth Proportional to 9,879.86, 13,634.56 and 5,631.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,879.86 : 13,634.56 = 5,631.56 : x
2. Step 2: Convert to fraction form
   9,879.86/13,634.56 = 5,631.56/x
3. Step 3: Cross multiply
   9,879.86x = 13,634.56 × 5,631.56
4. Step 4: Simplify right side
   9,879.86x = 76,783,832.71
5. Step 5: Solve for x
   x = 76,783,832.71/9,879.86
6. Step 6: Final answer
   x = 7,771.75