Finding the Fourth Proportional to 8,769.42, 12,100.59 and 4,991.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,769.42 : 12,100.59 = 4,991.34 : x
2. Step 2: Convert to fraction form
   8,769.42/12,100.59 = 4,991.34/x
3. Step 3: Cross multiply
   8,769.42x = 12,100.59 × 4,991.34
4. Step 4: Simplify right side
   8,769.42x = 60,398,158.89
5. Step 5: Solve for x
   x = 60,398,158.89/8,769.42
6. Step 6: Final answer
   x = 6,887.36