Finding the Fourth Proportional to 105,886.05, 158,860.18 and 42,673.64

Step by Step Solution

1. Step 1: Write the proportion equation
   105,886.05 : 158,860.18 = 42,673.64 : x
2. Step 2: Convert to fraction form
   105,886.05/158,860.18 = 42,673.64/x
3. Step 3: Cross multiply
   105,886.05x = 158,860.18 × 42,673.64
4. Step 4: Simplify right side
   105,886.05x = 6,779,141,728.31
5. Step 5: Solve for x
   x = 6,779,141,728.31/105,886.05
6. Step 6: Final answer
   x = 64,022.99