Finding the Fourth Proportional to 9,991.32, 13,788.96 and 7,469.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.32 : 13,788.96 = 7,469.06 : x
2. Step 2: Convert to fraction form
   9,991.32/13,788.96 = 7,469.06/x
3. Step 3: Cross multiply
   9,991.32x = 13,788.96 × 7,469.06
4. Step 4: Simplify right side
   9,991.32x = 102,990,569.58
5. Step 5: Solve for x
   x = 102,990,569.58/9,991.32
6. Step 6: Final answer
   x = 10,308.00