Finding the Fourth Proportional to 59,815.45, 89,723.31 and 56,161.81

Step by Step Solution

1. Step 1: Write the proportion equation
   59,815.45 : 89,723.31 = 56,161.81 : x
2. Step 2: Convert to fraction form
   59,815.45/89,723.31 = 56,161.81/x
3. Step 3: Cross multiply
   59,815.45x = 89,723.31 × 56,161.81
4. Step 4: Simplify right side
   59,815.45x = 5,039,023,488.79
5. Step 5: Solve for x
   x = 5,039,023,488.79/59,815.45
6. Step 6: Final answer
   x = 84,242.84