Finding the Fourth Proportional to 39,139.83, 54,012.83 and 21,234.51

Step by Step Solution

1. Step 1: Write the proportion equation
   39,139.83 : 54,012.83 = 21,234.51 : x
2. Step 2: Convert to fraction form
   39,139.83/54,012.83 = 21,234.51/x
3. Step 3: Cross multiply
   39,139.83x = 54,012.83 × 21,234.51
4. Step 4: Simplify right side
   39,139.83x = 1,146,935,872.59
5. Step 5: Solve for x
   x = 1,146,935,872.59/39,139.83
6. Step 6: Final answer
   x = 29,303.55