Finding the Fourth Proportional to 61,976.79, 85,429.82 and 56,828.23

Step by Step Solution

1. Step 1: Write the proportion equation
   61,976.79 : 85,429.82 = 56,828.23 : x
2. Step 2: Convert to fraction form
   61,976.79/85,429.82 = 56,828.23/x
3. Step 3: Cross multiply
   61,976.79x = 85,429.82 × 56,828.23
4. Step 4: Simplify right side
   61,976.79x = 4,854,825,388.31
5. Step 5: Solve for x
   x = 4,854,825,388.31/61,976.79
6. Step 6: Final answer
   x = 78,332.96