Finding the Fourth Proportional to 55,300.35, 76,311.20 and 31,423.71

Step by Step Solution

1. Step 1: Write the proportion equation
   55,300.35 : 76,311.20 = 31,423.71 : x
2. Step 2: Convert to fraction form
   55,300.35/76,311.20 = 31,423.71/x
3. Step 3: Cross multiply
   55,300.35x = 76,311.20 × 31,423.71
4. Step 4: Simplify right side
   55,300.35x = 2,397,980,861.43
5. Step 5: Solve for x
   x = 2,397,980,861.43/55,300.35
6. Step 6: Final answer
   x = 43,362.85