Finding the Fourth Proportional to 39,899.34, 55,061.46 and 21,995.00

Step by Step Solution

1. Step 1: Write the proportion equation
   39,899.34 : 55,061.46 = 21,995.00 : x
2. Step 2: Convert to fraction form
   39,899.34/55,061.46 = 21,995.00/x
3. Step 3: Cross multiply
   39,899.34x = 55,061.46 × 21,995.00
4. Step 4: Simplify right side
   39,899.34x = 1,211,076,537.39
5. Step 5: Solve for x
   x = 1,211,076,537.39/39,899.34
6. Step 6: Final answer
   x = 30,353.30