Finding the Fourth Proportional to 11,642.37, 17,458.47 and 3,320.53

Step by Step Solution

1. Step 1: Write the proportion equation
   11,642.37 : 17,458.47 = 3,320.53 : x
2. Step 2: Convert to fraction form
   11,642.37/17,458.47 = 3,320.53/x
3. Step 3: Cross multiply
   11,642.37x = 17,458.47 × 3,320.53
4. Step 4: Simplify right side
   11,642.37x = 57,971,373.39
5. Step 5: Solve for x
   x = 57,971,373.39/11,642.37
6. Step 6: Final answer
   x = 4,979.34