Finding the Fourth Proportional to 71,915.47, 107,855.90 and 21,996.00

Step by Step Solution

1. Step 1: Write the proportion equation
   71,915.47 : 107,855.90 = 21,996.00 : x
2. Step 2: Convert to fraction form
   71,915.47/107,855.90 = 21,996.00/x
3. Step 3: Cross multiply
   71,915.47x = 107,855.90 × 21,996.00
4. Step 4: Simplify right side
   71,915.47x = 2,372,398,944.50
5. Step 5: Solve for x
   x = 2,372,398,944.50/71,915.47
6. Step 6: Final answer
   x = 32,988.71