Finding the Fourth Proportional to 13,014.56, 17,961.72 and 7,711.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,014.56 : 17,961.72 = 7,711.40 : x
2. Step 2: Convert to fraction form
   13,014.56/17,961.72 = 7,711.40/x
3. Step 3: Cross multiply
   13,014.56x = 17,961.72 × 7,711.40
4. Step 4: Simplify right side
   13,014.56x = 138,510,007.61
5. Step 5: Solve for x
   x = 138,510,007.61/13,014.56
6. Step 6: Final answer
   x = 10,642.70