Finding the Fourth Proportional to 12,312.37, 18,475.37 and 7,634.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,312.37 : 18,475.37 = 7,634.89 : x
2. Step 2: Convert to fraction form
   12,312.37/18,475.37 = 7,634.89/x
3. Step 3: Cross multiply
   12,312.37x = 18,475.37 × 7,634.89
4. Step 4: Simplify right side
   12,312.37x = 141,057,287.11
5. Step 5: Solve for x
   x = 141,057,287.11/12,312.37
6. Step 6: Final answer
   x = 11,456.56