Finding the Fourth Proportional to 23,051.50, 31,814.10 and 12,981.91

Step by Step Solution

1. Step 1: Write the proportion equation
   23,051.50 : 31,814.10 = 12,981.91 : x
2. Step 2: Convert to fraction form
   23,051.50/31,814.10 = 12,981.91/x
3. Step 3: Cross multiply
   23,051.50x = 31,814.10 × 12,981.91
4. Step 4: Simplify right side
   23,051.50x = 413,007,690.92
5. Step 5: Solve for x
   x = 413,007,690.92/23,051.50
6. Step 6: Final answer
   x = 17,916.74