Finding the Fourth Proportional to 39,900.45, 55,063.01 and 21,996.10

Step by Step Solution

1. Step 1: Write the proportion equation
   39,900.45 : 55,063.01 = 21,996.10 : x
2. Step 2: Convert to fraction form
   39,900.45/55,063.01 = 21,996.10/x
3. Step 3: Cross multiply
   39,900.45x = 55,063.01 × 21,996.10
4. Step 4: Simplify right side
   39,900.45x = 1,211,171,446.77
5. Step 5: Solve for x
   x = 1,211,171,446.77/39,900.45
6. Step 6: Final answer
   x = 30,354.83