Finding the Fourth Proportional to 7,260.00, 9,953.55 and 7,128.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,260.00 : 9,953.55 = 7,128.78 : x
2. Step 2: Convert to fraction form
   7,260.00/9,953.55 = 7,128.78/x
3. Step 3: Cross multiply
   7,260.00x = 9,953.55 × 7,128.78
4. Step 4: Simplify right side
   7,260.00x = 70,956,630.84
5. Step 5: Solve for x
   x = 70,956,630.84/7,260.00
6. Step 6: Final answer
   x = 9,773.65