Finding the Fourth Proportional to 9,307.67, 12,840.59 and 5,720.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,307.67 : 12,840.59 = 5,720.69 : x
2. Step 2: Convert to fraction form
   9,307.67/12,840.59 = 5,720.69/x
3. Step 3: Cross multiply
   9,307.67x = 12,840.59 × 5,720.69
4. Step 4: Simplify right side
   9,307.67x = 73,456,970.60
5. Step 5: Solve for x
   x = 73,456,970.60/9,307.67
6. Step 6: Final answer
   x = 7,892.09