Finding the Fourth Proportional to 9,840.99, 13,580.37 and 5,364.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,840.99 : 13,580.37 = 5,364.77 : x
2. Step 2: Convert to fraction form
   9,840.99/13,580.37 = 5,364.77/x
3. Step 3: Cross multiply
   9,840.99x = 13,580.37 × 5,364.77
4. Step 4: Simplify right side
   9,840.99x = 72,855,588.47
5. Step 5: Solve for x
   x = 72,855,588.47/9,840.99
6. Step 6: Final answer
   x = 7,403.28