Finding the Fourth Proportional to 31,287.78, 43,178.00 and 17,861.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,287.78 : 43,178.00 = 17,861.22 : x
2. Step 2: Convert to fraction form
   31,287.78/43,178.00 = 17,861.22/x
3. Step 3: Cross multiply
   31,287.78x = 43,178.00 × 17,861.22
4. Step 4: Simplify right side
   31,287.78x = 771,211,667.85
5. Step 5: Solve for x
   x = 771,211,667.85/31,287.78
6. Step 6: Final answer
   x = 24,648.97