Finding the Fourth Proportional to 9,062.88, 12,507.28 and 6,820.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,062.88 : 12,507.28 = 6,820.72 : x
2. Step 2: Convert to fraction form
   9,062.88/12,507.28 = 6,820.72/x
3. Step 3: Cross multiply
   9,062.88x = 12,507.28 × 6,820.72
4. Step 4: Simplify right side
   9,062.88x = 85,308,654.84
5. Step 5: Solve for x
   x = 85,308,654.84/9,062.88
6. Step 6: Final answer
   x = 9,412.97