Finding the Fourth Proportional to 39,624.05, 54,682.59 and 21,719.05

Step by Step Solution

1. Step 1: Write the proportion equation
   39,624.05 : 54,682.59 = 21,719.05 : x
2. Step 2: Convert to fraction form
   39,624.05/54,682.59 = 21,719.05/x
3. Step 3: Cross multiply
   39,624.05x = 54,682.59 × 21,719.05
4. Step 4: Simplify right side
   39,624.05x = 1,187,654,158.67
5. Step 5: Solve for x
   x = 1,187,654,158.67/39,624.05
6. Step 6: Final answer
   x = 29,973.06