Finding the Fourth Proportional to 22,980.84, 31,711.32 and 12,907

Step by Step Solution

1. Step 1: Write the proportion equation
   22,980.84 : 31,711.32 = 12,907 : x
2. Step 2: Convert to fraction form
   22,980.84/31,711.32 = 12,907/x
3. Step 3: Cross multiply
   22,980.84x = 31,711.32 × 12,907
4. Step 4: Simplify right side
   22,980.84x = 409,298,007.24
5. Step 5: Solve for x
   x = 409,298,007.24/22,980.84
6. Step 6: Final answer
   x = 17,810.40