Finding the Fourth Proportional to 9,156.58, 13,728.76 and 3,312.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,156.58 : 13,728.76 = 3,312.43 : x
2. Step 2: Convert to fraction form
   9,156.58/13,728.76 = 3,312.43/x
3. Step 3: Cross multiply
   9,156.58x = 13,728.76 × 3,312.43
4. Step 4: Simplify right side
   9,156.58x = 45,475,513.88
5. Step 5: Solve for x
   x = 45,475,513.88/9,156.58
6. Step 6: Final answer
   x = 4,966.43