Finding the Fourth Proportional to 31,686.89, 43,763.79 and 21,597.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,686.89 : 43,763.79 = 21,597.98 : x
2. Step 2: Convert to fraction form
   31,686.89/43,763.79 = 21,597.98/x
3. Step 3: Cross multiply
   31,686.89x = 43,763.79 × 21,597.98
4. Step 4: Simplify right side
   31,686.89x = 945,209,242.33
5. Step 5: Solve for x
   x = 945,209,242.33/31,686.89
6. Step 6: Final answer
   x = 29,829.67