Finding the Fourth Proportional to 61,899.89, 85,421.61 and 33,605.57

Step by Step Solution

1. Step 1: Write the proportion equation
   61,899.89 : 85,421.61 = 33,605.57 : x
2. Step 2: Convert to fraction form
   61,899.89/85,421.61 = 33,605.57/x
3. Step 3: Cross multiply
   61,899.89x = 85,421.61 × 33,605.57
4. Step 4: Simplify right side
   61,899.89x = 2,870,641,894.37
5. Step 5: Solve for x
   x = 2,870,641,894.37/61,899.89
6. Step 6: Final answer
   x = 46,375.56