Finding the Fourth Proportional to 23,056.56, 31,815.68 and 12,983.40

Step by Step Solution

1. Step 1: Write the proportion equation
   23,056.56 : 31,815.68 = 12,983.40 : x
2. Step 2: Convert to fraction form
   23,056.56/31,815.68 = 12,983.40/x
3. Step 3: Cross multiply
   23,056.56x = 31,815.68 × 12,983.40
4. Step 4: Simplify right side
   23,056.56x = 413,075,699.71
5. Step 5: Solve for x
   x = 413,075,699.71/23,056.56
6. Step 6: Final answer
   x = 17,915.76