Finding the Fourth Proportional to 28,005.16, 42,008.96 and 13,026.34

Step by Step Solution

1. Step 1: Write the proportion equation
   28,005.16 : 42,008.96 = 13,026.34 : x
2. Step 2: Convert to fraction form
   28,005.16/42,008.96 = 13,026.34/x
3. Step 3: Cross multiply
   28,005.16x = 42,008.96 × 13,026.34
4. Step 4: Simplify right side
   28,005.16x = 547,222,996.01
5. Step 5: Solve for x
   x = 547,222,996.01/28,005.16
6. Step 6: Final answer
   x = 19,540.08