Finding the Fourth Proportional to 59,077.20, 81,944.28 and 56,949.40

Step by Step Solution

1. Step 1: Write the proportion equation
   59,077.20 : 81,944.28 = 56,949.40 : x
2. Step 2: Convert to fraction form
   59,077.20/81,944.28 = 56,949.40/x
3. Step 3: Cross multiply
   59,077.20x = 81,944.28 × 56,949.40
4. Step 4: Simplify right side
   59,077.20x = 4,666,677,579.43
5. Step 5: Solve for x
   x = 4,666,677,579.43/59,077.20
6. Step 6: Final answer
   x = 78,992.87