Finding the Fourth Proportional to 7,917.72, 10,926.72 and 4,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,917.72 : 10,926.72 = 4,380.72 : x
2. Step 2: Convert to fraction form
   7,917.72/10,926.72 = 4,380.72/x
3. Step 3: Cross multiply
   7,917.72x = 10,926.72 × 4,380.72
4. Step 4: Simplify right side
   7,917.72x = 47,866,900.84
5. Step 5: Solve for x
   x = 47,866,900.84/7,917.72
6. Step 6: Final answer
   x = 6,045.54