Finding the Fourth Proportional to 12,301.62, 18,421.57 and 7,602.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,301.62 : 18,421.57 = 7,602.31 : x
2. Step 2: Convert to fraction form
   12,301.62/18,421.57 = 7,602.31/x
3. Step 3: Cross multiply
   12,301.62x = 18,421.57 × 7,602.31
4. Step 4: Simplify right side
   12,301.62x = 140,046,485.83
5. Step 5: Solve for x
   x = 140,046,485.83/12,301.62
6. Step 6: Final answer
   x = 11,384.39