Finding the Fourth Proportional to 11,620.40, 17,430.54 and 3,300.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,620.40 : 17,430.54 = 3,300.42 : x
2. Step 2: Convert to fraction form
   11,620.40/17,430.54 = 3,300.42/x
3. Step 3: Cross multiply
   11,620.40x = 17,430.54 × 3,300.42
4. Step 4: Simplify right side
   11,620.40x = 57,528,102.83
5. Step 5: Solve for x
   x = 57,528,102.83/11,620.40
6. Step 6: Final answer
   x = 4,950.61