Finding the Fourth Proportional to 42,007.86, 63,020.43 and 28,866.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.86 : 63,020.43 = 28,866.42 : x
2. Step 2: Convert to fraction form
   42,007.86/63,020.43 = 28,866.42/x
3. Step 3: Cross multiply
   42,007.86x = 63,020.43 × 28,866.42
4. Step 4: Simplify right side
   42,007.86x = 1,819,174,200.96
5. Step 5: Solve for x
   x = 1,819,174,200.96/42,007.86
6. Step 6: Final answer
   x = 43,305.57