Finding the Fourth Proportional to 13,933.55, 19,209.31 and 9,947.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,933.55 : 19,209.31 = 9,947.74 : x
2. Step 2: Convert to fraction form
   13,933.55/19,209.31 = 9,947.74/x
3. Step 3: Cross multiply
   13,933.55x = 19,209.31 × 9,947.74
4. Step 4: Simplify right side
   13,933.55x = 191,089,221.46
5. Step 5: Solve for x
   x = 191,089,221.46/13,933.55
6. Step 6: Final answer
   x = 13,714.32