Finding the Fourth Proportional to 5,156.12, 7,113.72 and 2,917.76

Step by Step Solution

1. Step 1: Write the proportion equation
   5,156.12 : 7,113.72 = 2,917.76 : x
2. Step 2: Convert to fraction form
   5,156.12/7,113.72 = 2,917.76/x
3. Step 3: Cross multiply
   5,156.12x = 7,113.72 × 2,917.76
4. Step 4: Simplify right side
   5,156.12x = 20,756,127.67
5. Step 5: Solve for x
   x = 20,756,127.67/5,156.12
6. Step 6: Final answer
   x = 4,025.53