Finding the Fourth Proportional to 8,687.12, 13,023.34 and 5,905.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,687.12 : 13,023.34 = 5,905.98 : x
2. Step 2: Convert to fraction form
   8,687.12/13,023.34 = 5,905.98/x
3. Step 3: Cross multiply
   8,687.12x = 13,023.34 × 5,905.98
4. Step 4: Simplify right side
   8,687.12x = 76,915,585.57
5. Step 5: Solve for x
   x = 76,915,585.57/8,687.12
6. Step 6: Final answer
   x = 8,853.98