Finding the Fourth Proportional to 6,781.30, 10,152.78 and 4,309.99

Step by Step Solution

1. Step 1: Write the proportion equation
   6,781.30 : 10,152.78 = 4,309.99 : x
2. Step 2: Convert to fraction form
   6,781.30/10,152.78 = 4,309.99/x
3. Step 3: Cross multiply
   6,781.30x = 10,152.78 × 4,309.99
4. Step 4: Simplify right side
   6,781.30x = 43,758,380.27
5. Step 5: Solve for x
   x = 43,758,380.27/6,781.30
6. Step 6: Final answer
   x = 6,452.80