Finding the Fourth Proportional to 10,346.72, 14,278.53 and 5,631

Step by Step Solution

1. Step 1: Write the proportion equation
   10,346.72 : 14,278.53 = 5,631 : x
2. Step 2: Convert to fraction form
   10,346.72/14,278.53 = 5,631/x
3. Step 3: Cross multiply
   10,346.72x = 14,278.53 × 5,631
4. Step 4: Simplify right side
   10,346.72x = 80,402,402.43
5. Step 5: Solve for x
   x = 80,402,402.43/10,346.72
6. Step 6: Final answer
   x = 7,770.81