Finding the Fourth Proportional to 8,955.72, 13,440.76 and 5,261.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,955.72 : 13,440.76 = 5,261.06 : x
2. Step 2: Convert to fraction form
   8,955.72/13,440.76 = 5,261.06/x
3. Step 3: Cross multiply
   8,955.72x = 13,440.76 × 5,261.06
4. Step 4: Simplify right side
   8,955.72x = 70,712,665.25
5. Step 5: Solve for x
   x = 70,712,665.25/8,955.72
6. Step 6: Final answer
   x = 7,895.81