Finding the Fourth Proportional to 8,920.09, 12,309.72 and 4,886.93

Step by Step Solution

1. Step 1: Write the proportion equation
   8,920.09 : 12,309.72 = 4,886.93 : x
2. Step 2: Convert to fraction form
   8,920.09/12,309.72 = 4,886.93/x
3. Step 3: Cross multiply
   8,920.09x = 12,309.72 × 4,886.93
4. Step 4: Simplify right side
   8,920.09x = 60,156,779.90
5. Step 5: Solve for x
   x = 60,156,779.90/8,920.09
6. Step 6: Final answer
   x = 6,743.97