Finding the Fourth Proportional to 12,156.17, 18,233.31 and 4,762.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,156.17 : 18,233.31 = 4,762.31 : x
2. Step 2: Convert to fraction form
   12,156.17/18,233.31 = 4,762.31/x
3. Step 3: Cross multiply
   12,156.17x = 18,233.31 × 4,762.31
4. Step 4: Simplify right side
   12,156.17x = 86,832,674.55
5. Step 5: Solve for x
   x = 86,832,674.55/12,156.17
6. Step 6: Final answer
   x = 7,143.09