Finding the Fourth Proportional to 9,840.72, 13,580.58 and 5,364.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,840.72 : 13,580.58 = 5,364.53 : x
2. Step 2: Convert to fraction form
   9,840.72/13,580.58 = 5,364.53/x
3. Step 3: Cross multiply
   9,840.72x = 13,580.58 × 5,364.53
4. Step 4: Simplify right side
   9,840.72x = 72,853,334.10
5. Step 5: Solve for x
   x = 72,853,334.10/9,840.72
6. Step 6: Final answer
   x = 7,403.25