Finding the Fourth Proportional to 10,133.56, 14,038.69 and 9,891.64

Step by Step Solution

1. Step 1: Write the proportion equation
   10,133.56 : 14,038.69 = 9,891.64 : x
2. Step 2: Convert to fraction form
   10,133.56/14,038.69 = 9,891.64/x
3. Step 3: Cross multiply
   10,133.56x = 14,038.69 × 9,891.64
4. Step 4: Simplify right side
   10,133.56x = 138,865,667.55
5. Step 5: Solve for x
   x = 138,865,667.55/10,133.56
6. Step 6: Final answer
   x = 13,703.54