Finding the Fourth Proportional to 3,925.27, 5,416.86 and 2,156.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,925.27 : 5,416.86 = 2,156.99 : x
2. Step 2: Convert to fraction form
   3,925.27/5,416.86 = 2,156.99/x
3. Step 3: Cross multiply
   3,925.27x = 5,416.86 × 2,156.99
4. Step 4: Simplify right side
   3,925.27x = 11,684,093.86
5. Step 5: Solve for x
   x = 11,684,093.86/3,925.27
6. Step 6: Final answer
   x = 2,976.63