Finding the Fourth Proportional to 8,421.50, 11,620.31 and 5,063.51

Step by Step Solution

1. Step 1: Write the proportion equation
   8,421.50 : 11,620.31 = 5,063.51 : x
2. Step 2: Convert to fraction form
   8,421.50/11,620.31 = 5,063.51/x
3. Step 3: Cross multiply
   8,421.50x = 11,620.31 × 5,063.51
4. Step 4: Simplify right side
   8,421.50x = 58,839,472.47
5. Step 5: Solve for x
   x = 58,839,472.47/8,421.50
6. Step 6: Final answer
   x = 6,986.82