Finding the Fourth Proportional to 71,083.12, 98,081.04 and 42,790.72

Step by Step Solution

1. Step 1: Write the proportion equation
   71,083.12 : 98,081.04 = 42,790.72 : x
2. Step 2: Convert to fraction form
   71,083.12/98,081.04 = 42,790.72/x
3. Step 3: Cross multiply
   71,083.12x = 98,081.04 × 42,790.72
4. Step 4: Simplify right side
   71,083.12x = 4,196,958,319.95
5. Step 5: Solve for x
   x = 4,196,958,319.95/71,083.12
6. Step 6: Final answer
   x = 59,042.97