Finding the Fourth Proportional to 31,216.16, 43,004.56 and 21,767.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,216.16 : 43,004.56 = 21,767.84 : x
2. Step 2: Convert to fraction form
   31,216.16/43,004.56 = 21,767.84/x
3. Step 3: Cross multiply
   31,216.16x = 43,004.56 × 21,767.84
4. Step 4: Simplify right side
   31,216.16x = 936,116,381.35
5. Step 5: Solve for x
   x = 936,116,381.35/31,216.16
6. Step 6: Final answer
   x = 29,988.20