Finding the Fourth Proportional to 31,446.86, 43,416.06 and 21,641

Step by Step Solution

1. Step 1: Write the proportion equation
   31,446.86 : 43,416.06 = 21,641 : x
2. Step 2: Convert to fraction form
   31,446.86/43,416.06 = 21,641/x
3. Step 3: Cross multiply
   31,446.86x = 43,416.06 × 21,641
4. Step 4: Simplify right side
   31,446.86x = 939,566,954.46
5. Step 5: Solve for x
   x = 939,566,954.46/31,446.86
6. Step 6: Final answer
   x = 29,877.93