Finding the Fourth Proportional to 12,152.31, 18,230.42 and 5,133.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,152.31 : 18,230.42 = 5,133.38 : x
2. Step 2: Convert to fraction form
   12,152.31/18,230.42 = 5,133.38/x
3. Step 3: Cross multiply
   12,152.31x = 18,230.42 × 5,133.38
4. Step 4: Simplify right side
   12,152.31x = 93,583,595.10
5. Step 5: Solve for x
   x = 93,583,595.10/12,152.31
6. Step 6: Final answer
   x = 7,700.89