Finding the Fourth Proportional to 9,788.16, 13,507.52 and 5,372.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,788.16 : 13,507.52 = 5,372.16 : x
2. Step 2: Convert to fraction form
   9,788.16/13,507.52 = 5,372.16/x
3. Step 3: Cross multiply
   9,788.16x = 13,507.52 × 5,372.16
4. Step 4: Simplify right side
   9,788.16x = 72,564,558.64
5. Step 5: Solve for x
   x = 72,564,558.64/9,788.16
6. Step 6: Final answer
   x = 7,413.50