Finding the Fourth Proportional to 86,939.85, 130,496.18 and 42,616.65

Step by Step Solution

1. Step 1: Write the proportion equation
   86,939.85 : 130,496.18 = 42,616.65 : x
2. Step 2: Convert to fraction form
   86,939.85/130,496.18 = 42,616.65/x
3. Step 3: Cross multiply
   86,939.85x = 130,496.18 × 42,616.65
4. Step 4: Simplify right side
   86,939.85x = 5,561,309,816.31
5. Step 5: Solve for x
   x = 5,561,309,816.31/86,939.85
6. Step 6: Final answer
   x = 63,967.33