Finding the Fourth Proportional to 5,131.17, 7,697.18 and 1,621.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.17 : 7,697.18 = 1,621.42 : x
2. Step 2: Convert to fraction form
   5,131.17/7,697.18 = 1,621.42/x
3. Step 3: Cross multiply
   5,131.17x = 7,697.18 × 1,621.42
4. Step 4: Simplify right side
   5,131.17x = 12,480,337.29
5. Step 5: Solve for x
   x = 12,480,337.29/5,131.17
6. Step 6: Final answer
   x = 2,432.26