Finding the Fourth Proportional to 9,879.31, 13,633.83 and 5,631.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,879.31 : 13,633.83 = 5,631.05 : x
2. Step 2: Convert to fraction form
   9,879.31/13,633.83 = 5,631.05/x
3. Step 3: Cross multiply
   9,879.31x = 13,633.83 × 5,631.05
4. Step 4: Simplify right side
   9,879.31x = 76,772,682.10
5. Step 5: Solve for x
   x = 76,772,682.10/9,879.31
6. Step 6: Final answer
   x = 7,771.06