Finding the Fourth Proportional to 23,139.96, 31,936.05 and 13,068.87

Step by Step Solution

1. Step 1: Write the proportion equation
   23,139.96 : 31,936.05 = 13,068.87 : x
2. Step 2: Convert to fraction form
   23,139.96/31,936.05 = 13,068.87/x
3. Step 3: Cross multiply
   23,139.96x = 31,936.05 × 13,068.87
4. Step 4: Simplify right side
   23,139.96x = 417,368,085.76
5. Step 5: Solve for x
   x = 417,368,085.76/23,139.96
6. Step 6: Final answer
   x = 18,036.68