Finding the Fourth Proportional to 42,005.09, 63,009.40 and 19,536.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,005.09 : 63,009.40 = 19,536.85 : x
2. Step 2: Convert to fraction form
   42,005.09/63,009.40 = 19,536.85/x
3. Step 3: Cross multiply
   42,005.09x = 63,009.40 × 19,536.85
4. Step 4: Simplify right side
   42,005.09x = 1,231,004,990.02
5. Step 5: Solve for x
   x = 1,231,004,990.02/42,005.09
6. Step 6: Final answer
   x = 29,306.09