Finding the Fourth Proportional to 9,720.84, 13,417.40 and 5,743.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,720.84 : 13,417.40 = 5,743.40 : x
2. Step 2: Convert to fraction form
   9,720.84/13,417.40 = 5,743.40/x
3. Step 3: Cross multiply
   9,720.84x = 13,417.40 × 5,743.40
4. Step 4: Simplify right side
   9,720.84x = 77,061,495.16
5. Step 5: Solve for x
   x = 77,061,495.16/9,720.84
6. Step 6: Final answer
   x = 7,927.45