Finding the Fourth Proportional to 392,131.72, 587,250.12 and 223,140.16

Step by Step Solution

1. Step 1: Write the proportion equation
   392,131.72 : 587,250.12 = 223,140.16 : x
2. Step 2: Convert to fraction form
   392,131.72/587,250.12 = 223,140.16/x
3. Step 3: Cross multiply
   392,131.72x = 587,250.12 × 223,140.16
4. Step 4: Simplify right side
   392,131.72x = 131,039,085,736.82
5. Step 5: Solve for x
   x = 131,039,085,736.82/392,131.72
6. Step 6: Final answer
   x = 334,171.09