Finding the Fourth Proportional to 9,977.28, 13,768.72 and 5,501.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,977.28 : 13,768.72 = 5,501.20 : x
2. Step 2: Convert to fraction form
   9,977.28/13,768.72 = 5,501.20/x
3. Step 3: Cross multiply
   9,977.28x = 13,768.72 × 5,501.20
4. Step 4: Simplify right side
   9,977.28x = 75,744,482.46
5. Step 5: Solve for x
   x = 75,744,482.46/9,977.28
6. Step 6: Final answer
   x = 7,591.70