Finding the Fourth Proportional to 59,308.56, 81,913 and 40,412.88

Step by Step Solution

1. Step 1: Write the proportion equation
   59,308.56 : 81,913 = 40,412.88 : x
2. Step 2: Convert to fraction form
   59,308.56/81,913 = 40,412.88/x
3. Step 3: Cross multiply
   59,308.56x = 81,913 × 40,412.88
4. Step 4: Simplify right side
   59,308.56x = 3,310,340,239.44
5. Step 5: Solve for x
   x = 3,310,340,239.44/59,308.56
6. Step 6: Final answer
   x = 55,815.56