Finding the Fourth Proportional to 50,640.90, 69,886.17 and 31,788.42

Step by Step Solution

1. Step 1: Write the proportion equation
   50,640.90 : 69,886.17 = 31,788.42 : x
2. Step 2: Convert to fraction form
   50,640.90/69,886.17 = 31,788.42/x
3. Step 3: Cross multiply
   50,640.90x = 69,886.17 × 31,788.42
4. Step 4: Simplify right side
   50,640.90x = 2,221,570,924.15
5. Step 5: Solve for x
   x = 2,221,570,924.15/50,640.90
6. Step 6: Final answer
   x = 43,869.10