Finding the Fourth Proportional to 23,120.88, 34,715.88 and 13,776.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,120.88 : 34,715.88 = 13,776.72 : x
2. Step 2: Convert to fraction form
   23,120.88/34,715.88 = 13,776.72/x
3. Step 3: Cross multiply
   23,120.88x = 34,715.88 × 13,776.72
4. Step 4: Simplify right side
   23,120.88x = 478,270,958.31
5. Step 5: Solve for x
   x = 478,270,958.31/23,120.88
6. Step 6: Final answer
   x = 20,685.67