Finding the Fourth Proportional to 28,008.45, 42,013.89 and 13,029.63

Step by Step Solution

1. Step 1: Write the proportion equation
   28,008.45 : 42,013.89 = 13,029.63 : x
2. Step 2: Convert to fraction form
   28,008.45/42,013.89 = 13,029.63/x
3. Step 3: Cross multiply
   28,008.45x = 42,013.89 × 13,029.63
4. Step 4: Simplify right side
   28,008.45x = 547,425,284.01
5. Step 5: Solve for x
   x = 547,425,284.01/28,008.45
6. Step 6: Final answer
   x = 19,545.00