Finding the Fourth Proportional to 23,121.42, 31,907.59 and 12,511.02

Step by Step Solution

1. Step 1: Write the proportion equation
   23,121.42 : 31,907.59 = 12,511.02 : x
2. Step 2: Convert to fraction form
   23,121.42/31,907.59 = 12,511.02/x
3. Step 3: Cross multiply
   23,121.42x = 31,907.59 × 12,511.02
4. Step 4: Simplify right side
   23,121.42x = 399,196,585.02
5. Step 5: Solve for x
   x = 399,196,585.02/23,121.42
6. Step 6: Final answer
   x = 17,265.23