Finding the Fourth Proportional to 10,667.79, 15,990.75 and 4,092.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,667.79 : 15,990.75 = 4,092.21 : x
2. Step 2: Convert to fraction form
   10,667.79/15,990.75 = 4,092.21/x
3. Step 3: Cross multiply
   10,667.79x = 15,990.75 × 4,092.21
4. Step 4: Simplify right side
   10,667.79x = 65,437,507.06
5. Step 5: Solve for x
   x = 65,437,507.06/10,667.79
6. Step 6: Final answer
   x = 6,134.12