Finding the Fourth Proportional to 22,422.72, 33,796.16 and 21,152.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,422.72 : 33,796.16 = 21,152.64 : x
2. Step 2: Convert to fraction form
   22,422.72/33,796.16 = 21,152.64/x
3. Step 3: Cross multiply
   22,422.72x = 33,796.16 × 21,152.64
4. Step 4: Simplify right side
   22,422.72x = 714,878,005.86
5. Step 5: Solve for x
   x = 714,878,005.86/22,422.72
6. Step 6: Final answer
   x = 31,881.86