Finding the Fourth Proportional to 31,648.26, 43,683.69 and 20,900.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,648.26 : 43,683.69 = 20,900.98 : x
2. Step 2: Convert to fraction form
   31,648.26/43,683.69 = 20,900.98/x
3. Step 3: Cross multiply
   31,648.26x = 43,683.69 × 20,900.98
4. Step 4: Simplify right side
   31,648.26x = 913,031,931.02
5. Step 5: Solve for x
   x = 913,031,931.02/31,648.26
6. Step 6: Final answer
   x = 28,849.36