Finding the Fourth Proportional to 9,078.76, 13,551.89 and 7,788.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,078.76 : 13,551.89 = 7,788.52 : x
2. Step 2: Convert to fraction form
   9,078.76/13,551.89 = 7,788.52/x
3. Step 3: Cross multiply
   9,078.76x = 13,551.89 × 7,788.52
4. Step 4: Simplify right side
   9,078.76x = 105,549,166.30
5. Step 5: Solve for x
   x = 105,549,166.30/9,078.76
6. Step 6: Final answer
   x = 11,625.95