Finding the Fourth Proportional to 17,890.78, 24,680.70 and 12,588.52

Step by Step Solution

1. Step 1: Write the proportion equation
   17,890.78 : 24,680.70 = 12,588.52 : x
2. Step 2: Convert to fraction form
   17,890.78/24,680.70 = 12,588.52/x
3. Step 3: Cross multiply
   17,890.78x = 24,680.70 × 12,588.52
4. Step 4: Simplify right side
   17,890.78x = 310,693,485.56
5. Step 5: Solve for x
   x = 310,693,485.56/17,890.78
6. Step 6: Final answer
   x = 17,366.12