Finding the Fourth Proportional to 61,942.18, 85,433.10 and 42,853.72

Step by Step Solution

1. Step 1: Write the proportion equation
   61,942.18 : 85,433.10 = 42,853.72 : x
2. Step 2: Convert to fraction form
   61,942.18/85,433.10 = 42,853.72/x
3. Step 3: Cross multiply
   61,942.18x = 85,433.10 × 42,853.72
4. Step 4: Simplify right side
   61,942.18x = 3,661,126,146.13
5. Step 5: Solve for x
   x = 3,661,126,146.13/61,942.18
6. Step 6: Final answer
   x = 59,105.54