Finding the Fourth Proportional to 21,400.57, 32,100.76 and 5,818.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,400.57 : 32,100.76 = 5,818.15 : x
2. Step 2: Convert to fraction form
   21,400.57/32,100.76 = 5,818.15/x
3. Step 3: Cross multiply
   21,400.57x = 32,100.76 × 5,818.15
4. Step 4: Simplify right side
   21,400.57x = 186,767,036.79
5. Step 5: Solve for x
   x = 186,767,036.79/21,400.57
6. Step 6: Final answer
   x = 8,727.20