Finding the Fourth Proportional to 8,100.72, 12,154.92 and 4,820.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.72 : 12,154.92 = 4,820.28 : x
2. Step 2: Convert to fraction form
   8,100.72/12,154.92 = 4,820.28/x
3. Step 3: Cross multiply
   8,100.72x = 12,154.92 × 4,820.28
4. Step 4: Simplify right side
   8,100.72x = 58,590,117.78
5. Step 5: Solve for x
   x = 58,590,117.78/8,100.72
6. Step 6: Final answer
   x = 7,232.70