Finding the Fourth Proportional to 22,599.91, 31,187.63 and 12,528.37

Step by Step Solution

1. Step 1: Write the proportion equation
   22,599.91 : 31,187.63 = 12,528.37 : x
2. Step 2: Convert to fraction form
   22,599.91/31,187.63 = 12,528.37/x
3. Step 3: Cross multiply
   22,599.91x = 31,187.63 × 12,528.37
4. Step 4: Simplify right side
   22,599.91x = 390,730,238.37
5. Step 5: Solve for x
   x = 390,730,238.37/22,599.91
6. Step 6: Final answer
   x = 17,289.02