Finding the Fourth Proportional to 9,788.43, 14,692.37 and 7,620.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,788.43 : 14,692.37 = 7,620.87 : x
2. Step 2: Convert to fraction form
   9,788.43/14,692.37 = 7,620.87/x
3. Step 3: Cross multiply
   9,788.43x = 14,692.37 × 7,620.87
4. Step 4: Simplify right side
   9,788.43x = 111,968,641.76
5. Step 5: Solve for x
   x = 111,968,641.76/9,788.43
6. Step 6: Final answer
   x = 11,438.88