Finding the Fourth Proportional to 33,698.34, 50,565.72 and 13,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   33,698.34 : 50,565.72 = 13,990.50 : x
2. Step 2: Convert to fraction form
   33,698.34/50,565.72 = 13,990.50/x
3. Step 3: Cross multiply
   33,698.34x = 50,565.72 × 13,990.50
4. Step 4: Simplify right side
   33,698.34x = 707,439,705.66
5. Step 5: Solve for x
   x = 707,439,705.66/33,698.34
6. Step 6: Final answer
   x = 20,993.31