Finding the Fourth Proportional to 8,709.86, 12,019.70 and 4,731.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,709.86 : 12,019.70 = 4,731.05 : x
2. Step 2: Convert to fraction form
   8,709.86/12,019.70 = 4,731.05/x
3. Step 3: Cross multiply
   8,709.86x = 12,019.70 × 4,731.05
4. Step 4: Simplify right side
   8,709.86x = 56,865,778.03
5. Step 5: Solve for x
   x = 56,865,778.03/8,709.86
6. Step 6: Final answer
   x = 6,528.90