Finding the Fourth Proportional to 31,974.72, 44,131.68 and 21,356.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,974.72 : 44,131.68 = 21,356.16 : x
2. Step 2: Convert to fraction form
   31,974.72/44,131.68 = 21,356.16/x
3. Step 3: Cross multiply
   31,974.72x = 44,131.68 × 21,356.16
4. Step 4: Simplify right side
   31,974.72x = 942,483,219.15
5. Step 5: Solve for x
   x = 942,483,219.15/31,974.72
6. Step 6: Final answer
   x = 29,475.89