Finding the Fourth Proportional to 61,979.29, 85,433.27 and 56,830.73

Step by Step Solution

1. Step 1: Write the proportion equation
   61,979.29 : 85,433.27 = 56,830.73 : x
2. Step 2: Convert to fraction form
   61,979.29/85,433.27 = 56,830.73/x
3. Step 3: Cross multiply
   61,979.29x = 85,433.27 × 56,830.73
4. Step 4: Simplify right side
   61,979.29x = 4,855,235,100.39
5. Step 5: Solve for x
   x = 4,855,235,100.39/61,979.29
6. Step 6: Final answer
   x = 78,336.41