Finding the Fourth Proportional to 10,667.04, 14,721.82 and 6,420.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,667.04 : 14,721.82 = 6,420.31 : x
2. Step 2: Convert to fraction form
   10,667.04/14,721.82 = 6,420.31/x
3. Step 3: Cross multiply
   10,667.04x = 14,721.82 × 6,420.31
4. Step 4: Simplify right side
   10,667.04x = 94,518,574.56
5. Step 5: Solve for x
   x = 94,518,574.56/10,667.04
6. Step 6: Final answer
   x = 8,860.81