Finding the Fourth Proportional to 9,307.56, 12,844.34 and 5,115.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,307.56 : 12,844.34 = 5,115.72 : x
2. Step 2: Convert to fraction form
   9,307.56/12,844.34 = 5,115.72/x
3. Step 3: Cross multiply
   9,307.56x = 12,844.34 × 5,115.72
4. Step 4: Simplify right side
   9,307.56x = 65,708,047.02
5. Step 5: Solve for x
   x = 65,708,047.02/9,307.56
6. Step 6: Final answer
   x = 7,059.64