Finding the Fourth Proportional to 8,698.72, 12,004.32 and 4,921.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,698.72 : 12,004.32 = 4,921.88 : x
2. Step 2: Convert to fraction form
   8,698.72/12,004.32 = 4,921.88/x
3. Step 3: Cross multiply
   8,698.72x = 12,004.32 × 4,921.88
4. Step 4: Simplify right side
   8,698.72x = 59,083,822.52
5. Step 5: Solve for x
   x = 59,083,822.52/8,698.72
6. Step 6: Final answer
   x = 6,792.24