Finding the Fourth Proportional to 10,347.13, 14,278.98 and 5,631.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,347.13 : 14,278.98 = 5,631.31 : x
2. Step 2: Convert to fraction form
   10,347.13/14,278.98 = 5,631.31/x
3. Step 3: Cross multiply
   10,347.13x = 14,278.98 × 5,631.31
4. Step 4: Simplify right side
   10,347.13x = 80,409,362.86
5. Step 5: Solve for x
   x = 80,409,362.86/10,347.13
6. Step 6: Final answer
   x = 7,771.18