Finding the Fourth Proportional to 17,861.58, 26,801.82 and 12,971.61

Step by Step Solution

1. Step 1: Write the proportion equation
   17,861.58 : 26,801.82 = 12,971.61 : x
2. Step 2: Convert to fraction form
   17,861.58/26,801.82 = 12,971.61/x
3. Step 3: Cross multiply
   17,861.58x = 26,801.82 × 12,971.61
4. Step 4: Simplify right side
   17,861.58x = 347,662,756.33
5. Step 5: Solve for x
   x = 347,662,756.33/17,861.58
6. Step 6: Final answer
   x = 19,464.28