Finding the Fourth Proportional to 86,872.89, 130,105.22 and 42,360.09

Step by Step Solution

1. Step 1: Write the proportion equation
   86,872.89 : 130,105.22 = 42,360.09 : x
2. Step 2: Convert to fraction form
   86,872.89/130,105.22 = 42,360.09/x
3. Step 3: Cross multiply
   86,872.89x = 130,105.22 × 42,360.09
4. Step 4: Simplify right side
   86,872.89x = 5,511,268,616.87
5. Step 5: Solve for x
   x = 5,511,268,616.87/86,872.89
6. Step 6: Final answer
   x = 63,440.60