Finding the Fourth Proportional to 8,749.54, 12,072.20 and 5,345.67

Step by Step Solution

1. Step 1: Write the proportion equation
   8,749.54 : 12,072.20 = 5,345.67 : x
2. Step 2: Convert to fraction form
   8,749.54/12,072.20 = 5,345.67/x
3. Step 3: Cross multiply
   8,749.54x = 12,072.20 × 5,345.67
4. Step 4: Simplify right side
   8,749.54x = 64,533,970.65
5. Step 5: Solve for x
   x = 64,533,970.65/8,749.54
6. Step 6: Final answer
   x = 7,375.70