Finding the Fourth Proportional to 8,931.57, 12,330.45 and 5,906.84

Step by Step Solution

1. Step 1: Write the proportion equation
   8,931.57 : 12,330.45 = 5,906.84 : x
2. Step 2: Convert to fraction form
   8,931.57/12,330.45 = 5,906.84/x
3. Step 3: Cross multiply
   8,931.57x = 12,330.45 × 5,906.84
4. Step 4: Simplify right side
   8,931.57x = 72,833,933.63
5. Step 5: Solve for x
   x = 72,833,933.63/8,931.57
6. Step 6: Final answer
   x = 8,154.66