Finding the Fourth Proportional to 22,160.62, 33,111.15 and 21,385.45

Step by Step Solution

1. Step 1: Write the proportion equation
   22,160.62 : 33,111.15 = 21,385.45 : x
2. Step 2: Convert to fraction form
   22,160.62/33,111.15 = 21,385.45/x
3. Step 3: Cross multiply
   22,160.62x = 33,111.15 × 21,385.45
4. Step 4: Simplify right side
   22,160.62x = 708,096,803.96
5. Step 5: Solve for x
   x = 708,096,803.96/22,160.62
6. Step 6: Final answer
   x = 31,952.93