Finding the Fourth Proportional to 8,920.02, 12,309.86 and 4,887.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,920.02 : 12,309.86 = 4,887.07 : x
2. Step 2: Convert to fraction form
   8,920.02/12,309.86 = 4,887.07/x
3. Step 3: Cross multiply
   8,920.02x = 12,309.86 × 4,887.07
4. Step 4: Simplify right side
   8,920.02x = 60,159,128.95
5. Step 5: Solve for x
   x = 60,159,128.95/8,920.02
6. Step 6: Final answer
   x = 6,744.28