Finding the Fourth Proportional to 71,671.72, 107,511.69 and 21,753.45

Step by Step Solution

1. Step 1: Write the proportion equation
   71,671.72 : 107,511.69 = 21,753.45 : x
2. Step 2: Convert to fraction form
   71,671.72/107,511.69 = 21,753.45/x
3. Step 3: Cross multiply
   71,671.72x = 107,511.69 × 21,753.45
4. Step 4: Simplify right side
   71,671.72x = 2,338,750,172.83
5. Step 5: Solve for x
   x = 2,338,750,172.83/71,671.72
6. Step 6: Final answer
   x = 32,631.42