Finding the Fourth Proportional to 50,978.42, 76,381.35 and 31,215.71

Step by Step Solution

1. Step 1: Write the proportion equation
   50,978.42 : 76,381.35 = 31,215.71 : x
2. Step 2: Convert to fraction form
   50,978.42/76,381.35 = 31,215.71/x
3. Step 3: Cross multiply
   50,978.42x = 76,381.35 × 31,215.71
4. Step 4: Simplify right side
   50,978.42x = 2,384,298,071.01
5. Step 5: Solve for x
   x = 2,384,298,071.01/50,978.42
6. Step 6: Final answer
   x = 46,770.73