Finding the Fourth Proportional to 50,585.31, 75,911.82 and 21,003.18

Step by Step Solution

1. Step 1: Write the proportion equation
   50,585.31 : 75,911.82 = 21,003.18 : x
2. Step 2: Convert to fraction form
   50,585.31/75,911.82 = 21,003.18/x
3. Step 3: Cross multiply
   50,585.31x = 75,911.82 × 21,003.18
4. Step 4: Simplify right side
   50,585.31x = 1,594,389,619.59
5. Step 5: Solve for x
   x = 1,594,389,619.59/50,585.31
6. Step 6: Final answer
   x = 31,518.83