Finding the Fourth Proportional to 3,925.43, 5,416.82 and 2,156.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,925.43 : 5,416.82 = 2,156.99 : x
2. Step 2: Convert to fraction form
   3,925.43/5,416.82 = 2,156.99/x
3. Step 3: Cross multiply
   3,925.43x = 5,416.82 × 2,156.99
4. Step 4: Simplify right side
   3,925.43x = 11,684,026.57
5. Step 5: Solve for x
   x = 11,684,026.57/3,925.43
6. Step 6: Final answer
   x = 2,976.50