Finding the Fourth Proportional to 8,749.86, 12,072.15 and 7,907.87

Step by Step Solution

1. Step 1: Write the proportion equation
   8,749.86 : 12,072.15 = 7,907.87 : x
2. Step 2: Convert to fraction form
   8,749.86/12,072.15 = 7,907.87/x
3. Step 3: Cross multiply
   8,749.86x = 12,072.15 × 7,907.87
4. Step 4: Simplify right side
   8,749.86x = 95,464,932.46
5. Step 5: Solve for x
   x = 95,464,932.46/8,749.86
6. Step 6: Final answer
   x = 10,910.45