Finding the Fourth Proportional to 23,139.42, 31,929.50 and 13,066.62

Step by Step Solution

1. Step 1: Write the proportion equation
   23,139.42 : 31,929.50 = 13,066.62 : x
2. Step 2: Convert to fraction form
   23,139.42/31,929.50 = 13,066.62/x
3. Step 3: Cross multiply
   23,139.42x = 31,929.50 × 13,066.62
4. Step 4: Simplify right side
   23,139.42x = 417,210,643.29
5. Step 5: Solve for x
   x = 417,210,643.29/23,139.42
6. Step 6: Final answer
   x = 18,030.30