Finding the Fourth Proportional to 8,383.69, 11,570.18 and 5,405.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,383.69 : 11,570.18 = 5,405.72 : x
2. Step 2: Convert to fraction form
   8,383.69/11,570.18 = 5,405.72/x
3. Step 3: Cross multiply
   8,383.69x = 11,570.18 × 5,405.72
4. Step 4: Simplify right side
   8,383.69x = 62,545,126.40
5. Step 5: Solve for x
   x = 62,545,126.40/8,383.69
6. Step 6: Final answer
   x = 7,460.34