Finding the Fourth Proportional to 11,854.29, 17,782.47 and 3,420.84

Step by Step Solution

1. Step 1: Write the proportion equation
   11,854.29 : 17,782.47 = 3,420.84 : x
2. Step 2: Convert to fraction form
   11,854.29/17,782.47 = 3,420.84/x
3. Step 3: Cross multiply
   11,854.29x = 17,782.47 × 3,420.84
4. Step 4: Simplify right side
   11,854.29x = 60,830,984.67
5. Step 5: Solve for x
   x = 60,830,984.67/11,854.29
6. Step 6: Final answer
   x = 5,131.56