Finding the Fourth Proportional to 42,108.86, 63,198.83 and 21,042.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42,108.86 : 63,198.83 = 21,042.59 : x
2. Step 2: Convert to fraction form
   42,108.86/63,198.83 = 21,042.59/x
3. Step 3: Cross multiply
   42,108.86x = 63,198.83 × 21,042.59
4. Step 4: Simplify right side
   42,108.86x = 1,329,866,804.78
5. Step 5: Solve for x
   x = 1,329,866,804.78/42,108.86
6. Step 6: Final answer
   x = 31,581.64