Finding the Fourth Proportional to 43,321.41, 64,990.22 and 13,731.30

Step by Step Solution

1. Step 1: Write the proportion equation
   43,321.41 : 64,990.22 = 13,731.30 : x
2. Step 2: Convert to fraction form
   43,321.41/64,990.22 = 13,731.30/x
3. Step 3: Cross multiply
   43,321.41x = 64,990.22 × 13,731.30
4. Step 4: Simplify right side
   43,321.41x = 892,400,207.89
5. Step 5: Solve for x
   x = 892,400,207.89/43,321.41
6. Step 6: Final answer
   x = 20,599.52